# CBSE Worksheet for chapter-3 Motion class 9

## Find CBSE Worksheet for chapter-3 Motion class 9

CLASS-9

BOARD: CBSE

Physics Worksheet - 3

TOPIC: Motion

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#### SUMMARY

• Graphical representation of motion - Distance – Time graph, Displacement - time graph
• Speed – Time graph, Velocity – Time graph
• Circular motion – Definition, Explanation, Nature, Terms related with circular motion

#### SECTION - 1

1. Area between speed- time graph and time axis gives:
1. Distance
2. Velocity
3. Speed
4. None of these
2. An object undergoes an acceleration of 8 m/s2 starting from rest. Distance travelled in 1 sec is:
1. 2 m
2. 4 m
3. 6 m
4. 8 m
3. Slope of acceleration time graph gives:
1. Rate of change of velocity with respect to time
2. Rate of change of acceleration with respect to time
3. Change in velocity
4. Change in acceleration
4. If the displacement-time graph of a particle is perpendicular to the time axis, then velocity of particle is:
1. Infinity
2. Equal to the acceleration of the body
3. Unity
4. Zero
5. A flywheel making 120 rpm. Find the angular speed of the wheel:
6. Slope of the velocity time graph gives
1. Acceleration
2. Displacement
3. Distance
4. None of these
7. Uniform circular motion is an example of:
1. Constant acceleration
2. Variable acceleration
3. Both A and B
4. None of these
8. Area of acceleration-time graph gives:
1. Rate of change of velocity with the time
2. Rate of change of acceleration with time
3. Change in velocity
4. Change in acceleration
9. A body moving along circular path may have:
1. A constant speed
2. A constant velocity
3. No tangential velocity
10. Find the ratio of Distance covered to the Displacement covered by the body moving along semi-circular path of radius r:
1. π/2
2. π
3. None of these.

#### SECTION II - SUBJECTIVE

1. Define the following:
1. Angular displacement
2. Angular velocity
3. Angular acceleration.
2. Derive relation between: Linear acceleration and angular acceleration.
3. Differentiate between Uniform linear motion & Uniform circular motion.
4. Define the time period and find the relation between v and .

### Solutions: to worksheet-3 Motion

#### Objective Problems:

 1. (A) 2. (B) 3. (B) 4. (A) 5. (A) 6. (A) 7. (B) 8. (C) 9. (A) 10. (B)