Enhance your understanding of Rest and Motion MCQs Class 9. Dive into fundamental concepts, test your knowledge, and ace your exams effortlessly. Perfect for students and educators alike!

Welcome to a comprehensive collection of multiple-choice questions (MCQs) designed to sharpen your grasp on the principles of Rest and Motion class 9. Whether you’re a student gearing up for exams or an educator seeking effective teaching aids, these carefully curated MCQs from Kinematics chapter are tailored to meet your needs. Delve into the intricacies of physics, challenge your understanding, and solidify your comprehension with this invaluable resource.

- Which of the following is an example of rest?

A) A moving car

B) A swinging pendulum

C) A stationary bicycle

D) A flying airplane**Correct Option: C****Explanation:**Rest refers to the state of an object when it is not changing its position with respect to its surroundings. A stationary bicycle is an example of rest as it is not in motion. - An object moves along a straight line without changing its position with respect to a fixed point. This statement defines:

A) Rest

B) Motion

C) Speed

D) Velocity**Correct Option: A****Explanation:**Rest refers to the state of an object when it is not changing its position with respect to its surroundings. - Which of the following is a scalar quantity?

A) Displacement

B) Velocity

C) Speed

D) Acceleration**Correct Option: C****Explanation:**Speed is a scalar quantity as it only has magnitude and no direction. - If a car is moving with a constant speed of 60 km/h, its velocity is:

A) 60 km/h

B) 60 km/h south

C) 60 km/h east

D) 0 km/h**Correct Option: A****Explanation:**Velocity is the rate of change of displacement. Since the car is moving with constant speed, its velocity is also 60 km/h. - Which of the following is a vector quantity?

A) Time

B) Distance

C) Mass

D) Displacement**Correct Option: D****Explanation:**Displacement is a vector quantity as it has both magnitude and direction. - A boy walks from point A to point B in a straight line. Which of the following statements is true?

A) His distance is equal to his displacement

B) His displacement is always greater than his distance

C) His displacement is less than or equal to his distance

D) His displacement is independent of his distance**Correct Option: A****Explanation:**When a person walks in a straight line, the distance covered is equal to the magnitude of displacement. - What is the SI unit of velocity?

A) m/s

B) m

C) s

D) km/h**Correct Option: A****Explanation:**The SI unit of velocity is meters per second (m/s). - An object covers a distance of 100 meters in 20 seconds. What is its average speed?

A) 5 m/s

B) 10 m/s

C) 15 m/s

D) 20 m/s**Correct Option: B****Explanation:**Average speed is calculated by dividing the total distance covered by the total time taken. - Which of the following represents uniform motion?

A) A car accelerating on a straight road

B) A ball falling freely under gravity

C) A bicycle moving with constant speed in a circular path

D) A rocket launching into space**Correct Option: C****Explanation:**Uniform motion is when an object moves with constant speed and in a straight line. - An object moves with a velocity of 5 m/s for 10 seconds. What is the displacement of the object?

A) 50 m

B) 10 m

C) 5 m

D) 0 m**Correct Option: A****Explanation:**Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time. - Which of the following statements is true about acceleration?

A) Acceleration is always in the direction of motion

B) Acceleration can be negative

C) Acceleration is always positive

D) Acceleration depends only on speed**Correct Option: B****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - If a car accelerates from 10 m/s to 30 m/s in 5 seconds, what is its acceleration?

A) 4 m/s²

B) 6 m/s²

C) 8 m/s²

D) 10 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - A ball is thrown vertically upwards. At its highest point:

A) Its velocity is zero and acceleration is maximum

B) Its velocity is maximum and acceleration is zero

C) Both velocity and acceleration are maximum

D) Both velocity and acceleration are zero**Correct Option: D****Explanation:**At the highest point, the ball momentarily stops and then starts falling back. Hence, both velocity and acceleration are zero. - A train starting from rest attains a velocity of 72 km/h in 10 seconds. What is its acceleration?

A) 2 m/s²

B) 3 m/s²

C) 4 m/s²

D) 5 m/s²**Correct Option: C****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - Which of the following is not a type of motion?

A) Circular motion

B) Vibratory motion

C) Periodic motion

D) Stationary motion**Correct Option: D****Explanation:**Stationary motion is not a type of motion. It refers to the state of rest. - A body is moving with uniform acceleration. Which of the following statements is true?

A) Its velocity increases at a constant rate

B) Its velocity increases with time

C) Its displacement increases with time

D) Its speed remains constant**Correct Option: B****Explanation:**Uniform acceleration means the velocity increases by equal amounts in equal intervals of time. - A cyclist travels 200 meters east and then 100 meters north. What is the magnitude of his displacement from the starting point?

A) 200 meters

B) 100 meters

C) 250 meters

D) 300 meters**Correct Option: C****Explanation:**Displacement is the shortest distance between the initial and final positions. It can be calculated using Pythagoras’ theorem. - Which of the following represents non-uniform motion?

A) A stone falling freely from a height

B) A car moving with constant speed on a straight road

C) A child swinging on a swing

D) A satellite orbiting the Earth**Correct Option: A****Explanation:**Non-uniform motion is when the object covers unequal distances in equal intervals of time. - A car accelerates uniformly from rest to a speed of 20 m/s in 5 seconds. What is its acceleration?

A) 2 m/s²

B) 4 m/s²

C) 6 m/s²

D) 8 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken.

- An object is thrown upwards with an initial velocity of 30 m/s. What is the velocity of the object after 3 seconds?

A) 0 m/s

B) 10 m/s

C) 20 m/s

D) 30 m/s**Correct Option: A****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - Which of the following is an example of circular motion?

A) A car moving on a straight road

B) A stone falling from a height

C) A pendulum swinging to and fro

D) A book sliding down a slope**Correct Option: C****Explanation:**Circular motion is when an object moves in a circular path around a fixed point. - A stone is thrown horizontally with a velocity of 10 m/s from a cliff. What is the horizontal component of its velocity after 2 seconds?

A) 0 m/s

B) 10 m/s

C) 20 m/s

D) 5 m/s**Correct Option: B****Explanation:**The horizontal component of velocity remains constant as there is no acceleration in the horizontal direction. - If an object moves with a constant speed, what can we say about its acceleration?

A) Acceleration is zero

B) Acceleration is positive

C) Acceleration is negative

D) Acceleration is changing**Correct Option: A****Explanation:**Acceleration is the rate of change of velocity. Since the speed is constant, there is no change in velocity, hence acceleration is zero. - An object is moving with a velocity of 20 m/s. After 5 seconds, its velocity becomes 30 m/s. What is its acceleration?

A) 2 m/s²

B) 4 m/s²

C) 6 m/s²

D) 10 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - Which of the following statements is true about speed?

A) Speed is always positive

B) Speed and velocity are the same

C) Speed depends on direction

D) Speed can be negative**Correct Option: A****Explanation:**Speed is a scalar quantity and is always positive. - An object moves with a velocity of 5 m/s. After 10 seconds, its velocity becomes -3 m/s. What is its acceleration?

A) -0.8 m/s²

B) -0.5 m/s²

C) 0.8 m/s²

D) 0.5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - Which of the following is an example of periodic motion?

A) A car moving on a highway

B) A ball rolling down a hill

C) A swing moving back and forth

D) A rocket launching into space**Correct Option: C****Explanation:**Periodic motion is when an object repeats its motion after regular intervals of time. - A stone is dropped from the top of a building. What is its acceleration just before hitting the ground?

A) 9.8 m/s²

B) 4.9 m/s²

C) -9.8 m/s²

D) -4.9 m/s²**Correct Option: C****Explanation:**The acceleration due to gravity is always directed towards the center of the Earth and has a magnitude of 9.8 m/s². - An object is moving with a uniform velocity. What can we say about its acceleration?

A) Acceleration is zero

B) Acceleration is positive

C) Acceleration is negative

D) Acceleration is changing**Correct Option: A****Explanation:**Uniform velocity means there is no change in velocity, hence acceleration is zero. - A car accelerates uniformly from rest to a speed of 30 m/s in 10 seconds. What is its acceleration?

A) 2 m/s²

B) 3 m/s²

C) 4 m/s²

D) 5 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 20 m/s. After 5 seconds, its velocity becomes 10 m/s. What is its acceleration?

A) -2 m/s²

B) -2.5 m/s²

C) 2 m/s²

D) 2.5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - Which of the following represents uniform circular motion?

A) A car moving on a straight road

B) A stone falling from a height

C) A satellite orbiting the Earth

D) A pendulum swinging to and fro**Correct Option: C****Explanation:**Uniform circular motion is when an object moves in a circular path with constant speed. - An object moves with a uniform velocity of 10 m/s for 20 seconds. What is its displacement?

A) 200 m

B) 100 m

C) 20 m

D) 10 m**Correct Option: A****Explanation:**Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time. - Which of the following is an example of rectilinear motion?

A) A stone rotating in a circle

B) A car moving on a curved road

C) A ball rolling down a slope

D) A train moving on a straight track**Correct Option: D****Explanation:**Rectilinear motion is when an object moves along a straight line path. - An object is thrown vertically upwards with an initial velocity of 20 m/s. What is its velocity after 4 seconds?

A) 0 m/s

B) 10 m/s

C) -20 m/s

D) -10 m/s**Correct Option: C****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - Which of the following statements is true about displacement?

A) Displacement is always positive

B) Displacement depends on direction

C) Displacement is a scalar quantity

D) Displacement is the same as distance**Correct Option: B****Explanation:**Displacement is a vector quantity and depends on both magnitude and direction. - An object covers a distance of 50 meters in 10 seconds. What is its average speed?

A) 5 m/s

B) 10 m/s

C) 15 m/s

D) 20 m/s**Correct Option: A****Explanation:**Average speed is calculated by dividing the total distance covered by the total time taken.

- Which of the following statements is true about velocity?

A) Velocity is always positive

B) Velocity depends on direction

C) Velocity is a scalar quantity

D) Velocity is the same as speed**Correct Option: B****Explanation:**Velocity is a vector quantity and depends on both magnitude and direction. - A train accelerates from rest to a velocity of 36 km/h in 10 seconds. What is its acceleration?

A) 1 m/s²

B) 2 m/s²

C) 3 m/s²

D) 4 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 5 m/s. After 2 seconds, its velocity becomes 3 m/s. What is its acceleration?

A) -1 m/s²

B) -0.5 m/s²

C) 1 m/s²

D) 0.5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A car accelerates uniformly from rest to a speed of 10 m/s in 2 seconds. What is its acceleration?

A) 5 m/s²

B) 10 m/s²

C) 15 m/s²

D) 20 m/s²**Correct Option: A****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 30 m/s. After 5 seconds, its velocity becomes 15 m/s. What is its acceleration?

A) -3 m/s²

B) -3.75 m/s²

C) 3 m/s²

D) 3.75 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object is moving with a uniform velocity of 15 m/s. What can we say about its acceleration?

A) Acceleration is zero

B) Acceleration is positive

C) Acceleration is negative

D) Acceleration is changing**Correct Option: A****Explanation:**Uniform velocity means there is no change in velocity, hence acceleration is zero. - A car accelerates uniformly from rest to a speed of 40 m/s in 8 seconds. What is its acceleration?

A) 5 m/s²

B) 8 m/s²

C) 10 m/s²

D) 20 m/s²**Correct Option: C****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 10 m/s. After 3 seconds, its velocity becomes 20 m/s. What is its acceleration?

A) 3.33 m/s²

B) 3.75 m/s²

C) 6.67 m/s²

D) 7.5 m/s²**Correct Option: C****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - Which of the following is an example of projectile motion?

A) A stone falling freely under gravity

B) A car moving on a straight road

C) A pendulum swinging to and fro

D) A satellite orbiting the Earth**Correct Option: A****Explanation:**Projectile motion is the motion of an object thrown or projected into the air and subject only to the acceleration of gravity. - An object is moving with a velocity of 20 m/s. After 4 seconds, its velocity becomes 10 m/s. What is its acceleration?

A) -2.5 m/s²

B) -5 m/s²

C) 2.5 m/s²

D) 5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A car accelerates uniformly from rest to a speed of 50 km/h in 5 seconds. What is its acceleration?

A) 2 m/s²

B) 4 m/s²

C) 6 m/s²

D) 10 m/s²**Correct Option: C****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a uniform velocity of 12 m/s for 15 seconds. What is its displacement?

A) 120 m

B) 180 m

C) 150 m

D) 200 m**Correct Option: B****Explanation:**Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time. - Which of the following statements is true about acceleration?

A) Acceleration is always in the direction of motion

B) Acceleration can be negative

C) Acceleration is always positive

D) Acceleration depends only on speed**Correct Option: B****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object moves with a velocity of 10 m/s. After 2 seconds, its velocity becomes -5 m/s. What is its acceleration?

A) -7.5 m/s²

B) -2.5 m/s²

C) 7.5 m/s²

D) 2.5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 20 m/s. What is the velocity of the stone after 2 seconds?

A) 10 m/s

B) 20 m/s

C) 0 m/s

D) -20 m/s**Correct Option: D****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - An object moves with a uniform velocity. What can we say about its acceleration?

A) Acceleration is zero

B) Acceleration is positive

C) Acceleration is negative

D) Acceleration is changing**Correct Option: A****Explanation:**Uniform velocity means there is no change in velocity, hence acceleration is zero. - A car accelerates uniformly from rest to a speed of 25 m/s in 5 seconds. What is its acceleration?

A) 2 m/s²

B) 5 m/s²

C) 10 m/s²

D) 25 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 15 m/s. After 3 seconds, its velocity becomes 30 m/s. What is its acceleration?

A) 5 m/s²

B) 7.5 m/s²

C) 10 m/s²

D) 15 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - Which of the following is an example of uniform circular motion?

A) A car moving on a straight road

B) A stone falling from a height

C) A satellite orbiting the Earth

D) A pendulum swinging to and fro**Correct Option: C****Explanation:**Uniform circular motion is when an object moves in a circular path with constant speed. - An object moves with a uniform velocity of 10 m/s for 30 seconds. What is its displacement?

A) 300 m

B) 150 m

C) 30 m

D) 10 m**Correct Option: A****Explanation:**Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time. - Which of the following is an example of rectilinear motion?

A) A stone rotating in a circle

B) A car moving on a curved road

C) A ball rolling down a slope

D) A train moving on a straight track**Correct Option: D****Explanation:**Rectilinear motion is when an object moves along a straight line path. - An object is thrown vertically upwards with an initial velocity of 15 m/s. What is its velocity after 3 seconds?

A) 0 m/s

B) 15 m/s

C) -15 m/s

D) -30 m/s**Correct Option: C****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - Which of the following statements is true about displacement?

A) Displacement is always positive

B) Displacement depends on direction

C) Displacement is a scalar quantity

D) Displacement is the same as distance**Correct Option: B****Explanation:**Displacement is a vector quantity and depends on both magnitude and direction. - An object covers a distance of 40 meters in 10 seconds. What is its average speed?

A) 4 m/s

B) 10 m/s

C) 20 m/s

D) 40 m/s**Correct Option: A****Explanation:**Average speed is calculated by dividing the total distance covered by the total time taken. - Which of the following statements is true about velocity?

A) Velocity is always positive

B) Velocity depends on direction

C) Velocity is a scalar quantity

D) Velocity is the same as speed**Correct Option: B****Explanation:**Velocity is a vector quantity and depends on both magnitude and direction. - A car accelerates uniformly from rest to a speed of 60 km/h in 5 seconds. What is its acceleration?

A) 2 m/s²

B) 4 m/s²

C) 6 m/s²

D) 10 m/s²**Correct Option: C****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 25 m/s. After 5 seconds, its velocity becomes 10 m/s. What is its acceleration?

A) -3 m/s²

B) -3.75 m/s²

C) 3 m/s²

D) 3.75 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object is moving with a uniform velocity of 18 m/s. What can we say about its acceleration?

A) Acceleration is zero

B) Acceleration is positive

C) Acceleration is negative

D) Acceleration is changing**Correct Option: A****Explanation:**Uniform velocity means there is no change in velocity, hence acceleration is zero. - A car accelerates uniformly from rest to a speed of 80 km/h in 10 seconds. What is its acceleration?

A) 2 m/s²

B) 4 m/s²

C) 6 m/s²

D) 8 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 30 m/s. After 6 seconds, its velocity becomes 15 m/s. What is its acceleration?

A) -2.5 m/s²

B) -5 m/s²

C) 2.5 m/s²

D) 5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object is moving with a velocity of 40 m/s. After 4 seconds, its velocity becomes 20 m/s. What is its acceleration?

A) -5 m/s²

B) -5.5 m/s²

C) 5 m/s²

D) 5.5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 30 m/s. What is the velocity of the stone after 3 seconds?

A) 10 m/s

B) 20 m/s

C) 0 m/s

D) -30 m/s**Correct Option: D****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - Which of the following is an example of projectile motion?

A) A stone falling freely under gravity

B) A car moving on a straight road

C) A pendulum swinging to and fro

D) A satellite orbiting the Earth**Correct Option: A****Explanation:**Projectile motion is the motion of an object thrown or projected into the air and subject only to the acceleration of gravity. - An object moves with a velocity of 10 m/s. After 1 second, its velocity becomes -5 m/s. What is its acceleration?

A) -15 m/s²

B) -10 m/s²

C) 15 m/s²

D) 10 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 15 m/s. What is its velocity after 2 seconds?

A) 0 m/s

B) 15 m/s

C) -15 m/s

D) -30 m/s**Correct Option: C****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - An object is moving with a velocity of 20 m/s. After 2 seconds, its velocity becomes 10 m/s. What is its acceleration?

A) -5 m/s²

B) -5.5 m/s²

C) 5 m/s²

D) 5.5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A car accelerates uniformly from rest to a speed of 30 m/s in 6 seconds. What is its acceleration?

A) 3 m/s²

B) 5 m/s²

C) 10 m/s²

D) 15 m/s²**Correct Option: A****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a uniform velocity of 15 m/s for 10 seconds. What is its displacement?

A) 150 m

B) 100 m

C) 15 m

D) 10 m**Correct Option: A****Explanation:**Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time. - Which of the following statements is true about velocity?

A) Velocity is always positive

B) Velocity depends on direction

C) Velocity is a scalar quantity

D) Velocity is the same as speed**Correct Option: B****Explanation:**Velocity is a vector quantity and depends on both magnitude and direction. - An object moves with a velocity of 25 m/s. After 4 seconds, its velocity becomes 10 m/s. What is its acceleration?

A) -3.75 m/s²

B) -3.33 m/s²

C) 3.75 m/s²

D) 3.33 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object is moving with a uniform velocity of 20 m/s. What can we say about its acceleration?

A) Acceleration is zero

B) Acceleration is positive

C) Acceleration is negative

D) Acceleration is changing**Correct Option: A****Explanation:**Uniform velocity means there is no change in velocity, hence acceleration is zero. - A car accelerates uniformly from rest to a speed of 40 km/h in 4 seconds. What is its acceleration?

A) 2 m/s²

B) 5 m/s²

C) 10 m/s²

D) 20 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 35 m/s. After 5 seconds, its velocity becomes 20 m/s. What is its acceleration?

A) -3 m/s²

B) -3.5 m/s²

C) 3 m/s²

D) 3.5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object is moving with a velocity of 30 m/s. After 3 seconds, its velocity becomes 10 m/s. What is its acceleration?

A) -6.67 m/s²

B) -6.67 m/s²

C) 6.67 m/s²

D) 6.67 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 25 m/s. What is its velocity after 3 seconds?

A) 0 m/s

B) 25 m/s

C) -25 m/s

D) -50 m/s**Correct Option: C****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - Which of the following is an example of projectile motion?

A) A stone falling freely under gravity

B) A car moving on a straight road

C) A pendulum swinging to and fro

D) A satellite orbiting the Earth**Correct Option: A****Explanation:**Projectile motion is the motion of an object thrown or projected into the air and subject only to the acceleration of gravity. - An object moves with a velocity of 10 m/s. After 2 seconds, its velocity becomes -10 m/s. What is its acceleration?

A) -10 m/s²

B) -5 m/s²

C) 10 m/s²

D) 5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 10 m/s. What is its velocity after 2 seconds?

A) 0 m/s

B) 10 m/s

C) -10 m/s

D) -20 m/s**Correct Option: C****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - An object is moving with a velocity of 15 m/s. After 2 seconds, its velocity becomes 5 m/s. What is its acceleration?

A) -5 m/s²

B) -5 m/s²

C) 5 m/s²

D) 5 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A car accelerates uniformly from rest to a speed of 50 m/s in 5 seconds. What is its acceleration?

A) 10 m/s²

B) 5 m/s²

C) 2 m/s²

D) 1 m/s²**Correct Option: A****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken.

88. An object moves with a uniform velocity of 20 m/s for 5 seconds. What is its displacement?

A) 100 m

B) 150 m

C) 20 m

D) 5 m**Correct Option: C****Explanation:** Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time.

- Which of the following statements is true about velocity?

A) Velocity is always positive

B) Velocity depends on direction

C) Velocity is a scalar quantity

D) Velocity is the same as speed**Correct Option: B****Explanation:**Velocity is a vector quantity and depends on both magnitude and direction. - A car accelerates uniformly from rest to a speed of 80 km/h in 10 seconds. What is its acceleration?

A) 2 m/s²

B) 4 m/s²

C) 6 m/s²

D) 8 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 30 m/s. After 5 seconds, its velocity becomes 15 m/s. What is its acceleration?

A) -3 m/s²

B) -3.75 m/s²

C) 3 m/s²

D) 3.75 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object is moving with a velocity of 40 m/s. After 3 seconds, its velocity becomes 20 m/s. What is its acceleration?

A) -6.67 m/s²

B) -6.67 m/s²

C) 6.67 m/s²

D) 6.67 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 30 m/s. What is its velocity after 2 seconds?

A) 10 m/s

B) 20 m/s

C) 0 m/s

D) -30 m/s**Correct Option: D****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - Which of the following is an example of projectile motion?

A) A stone falling freely under gravity

B) A car moving on a straight road

C) A pendulum swinging to and fro

D) A satellite orbiting the Earth**Correct Option: A****Explanation:**Projectile motion is the motion of an object thrown or projected into the air and subject only to the acceleration of gravity. - An object moves with a velocity of 10 m/s. After 1 second, its velocity becomes -10 m/s. What is its acceleration?

A) -20 m/s²

B) -10 m/s²

C) 20 m/s²

D) 10 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 15 m/s. What is its velocity after 1 second?

A) 0 m/s

B) 15 m/s

C) -15 m/s

D) -30 m/s**Correct Option: C****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - An object is moving with a velocity of 20 m/s. After 1 second, its velocity becomes 10 m/s. What is its acceleration?

A) -10 m/s²

B) -10 m/s²

C) 10 m/s²

D) 10 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A car accelerates uniformly from rest to a speed of 30 m/s in 3 seconds. What is its acceleration?

A) 10 m/s²

B) 5 m/s²

C) 2 m/s²

D) 1 m/s²**Correct Option: A****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a uniform velocity of 20 m/s for 3 seconds. What is its displacement?

A) 60 m

B) 40 m

C) 20 m

D) 10 m**Correct Option: C****Explanation:**Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time. - Which of the following statements is true about velocity?

A) Velocity is always positive

B) Velocity depends on direction

C) Velocity is a scalar quantity

D) Velocity is the same as speed**Correct Option: B****Explanation:**Velocity is a vector quantity and depends on both magnitude and direction. - A car accelerates uniformly from rest to a speed of 40 km/h in 4 seconds. What is its acceleration?

A) 2 m/s²

B) 5 m/s²

C) 10 m/s²

D) 20 m/s²**Correct Option: B****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a velocity of 35 m/s. After 4 seconds, its velocity becomes 20 m/s. What is its acceleration?

A) -3.75 m/s²

B) -3.33 m/s²

C) 3.75 m/s²

D) 3.33 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - An object is moving with a velocity of 30 m/s. After 2 seconds, its velocity becomes 10 m/s. What is its acceleration?

A) -10 m/s²

B) -10 m/s²

C) 10 m/s²

D) 10 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 20 m/s. What is its velocity after 2 seconds?

A) 10 m/s

B) 20 m/s

C) 0 m/s

D) -20 m/s**Correct Option: D****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - Which of the following is an example of projectile motion?

A) A stone falling freely under gravity

B) A car moving on a straight road

C) A pendulum swinging to and fro

D) A satellite orbiting the Earth**Correct Option: A****Explanation:**Projectile motion is the motion of an object thrown or projected into the air and subject only to the acceleration of gravity. - An object moves with a velocity of 10 m/s. After 1 second, its velocity becomes -10 m/s. What is its acceleration?

A) -20 m/s²

B) -10 m/s²

C) 20 m/s²

D) 10 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A stone is thrown upwards with a velocity of 15 m/s. What is its velocity after 1 second?

A) 0 m/s

B) 15 m/s

C) -15 m/s

D) -30 m/s**Correct Option: C****Explanation:**At the highest point, the velocity becomes zero, and then the object starts to fall back downwards under the influence of gravity. - An object is moving with a velocity of 20 m/s. After 1 second, its velocity becomes 10 m/s. What is its acceleration?

A) -10 m/s²

B) -10 m/s²

C) 10 m/s²

D) 10 m/s²**Correct Option: A****Explanation:**Acceleration can be negative when the object is slowing down or changing direction opposite to its initial motion. - A car accelerates uniformly from rest to a speed of 30 m/s in 3 seconds. What is its acceleration?

A) 10 m/s²

B) 5 m/s²

C) 2 m/s²

D) 1 m/s²**Correct Option: A****Explanation:**Acceleration is calculated by dividing the change in velocity by the time taken. - An object moves with a uniform velocity of 20 m/s for 3 seconds. What is its displacement?

A) 60 m

B) 40 m

C) 20 m

D) 10 m**Correct Option: C****Explanation:**Displacement is calculated by multiplying velocity by time. Displacement = Velocity × Time.

Mastering the concepts of Rest and Motion is pivotal for anyone venturing into the realm of physics class 9. With these MCQs serving as your guide, you can navigate through the complexities of the subject with confidence and ease. Whether you’re aiming for academic excellence or simply seeking to deepen your understanding, let these MCQs be your trusted companion on your journey to success. Happy learning!

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