# CBSE Worksheet for chapter-1 Motion class 9

## Summary

• Rest and Motion, Motion in One, Two & Three dimension, Types of motion
• Scalar and Vector quantity, Distance and Displacement

### SECTION I – OBJECTIVE

1. A body whose position with respect to surrounding does not change is said to be in a state of:
1. Rest
2. Motion
3. Vibration
4. Oscillation
2. In the case of moving body
1. Displacement > Distance
2. Displacement < Distance
3. Displacement>Distance
4. Displacement < Distance
3. Vector quantities are those which have
1. Only direction
2. Only magnitude
3. Magnitude and direction
4. None of these
4. What is true about scalar quantities?
1. Scalar quantities have direction also.
2. Scalars can be added arithmetically.
3. There are special laws for scalar addition.
4. Scalars have special method to represent.
5. A body said to be in motion if:
1. Its position with respect to surrounding objects remains same
2. Its position with respect to surrounding objects keeps on changing
3. Both (A) and (B)
4. Neither (A) Nor (B)
6. Distance is always:
1. Shortest length between two points
2. Path covered by an object between two points
3. Product of length and time
4. D. None of the above
7. Displacement:
1. Is always positive
2. Is always negative
3. Either positive or negative
4. Neither positive nor negative
8. Examples of vector quantities are:
1. Velocity, length, and mass
2. Speed, length and mass
3. Time, displacement and mass
4. Velocity, displacement and force
9. Which of the following is not characteristic of displacement?
1. It is always positive.
2. It has both magnitude and direction.
3. It can be zero
4. Its magnitude is less than or equal to the actual path length of the object
10. The value on converting km/h into m/s:
1. 5/18
2. 5/36
3. 5/54
4. 5/324

#### SECTION II – SUBJECTIVE

1. Distinguish between: Distance and Displacement.
2. State any three types of motion with examples.
3. Define scalar quantity. Give two examples.
4. Define vector quantity. Give two examples.
5. Give any two examples to explain that motion is relative.
6. A person moves in a circular path centred at its origin O and having radius 1m. He starts from A and reaches diametrically opposite point B then find distance between A and B and magnitude of displacement between A and B

#### Solutions:

Objective Problems:

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

Subjective Problems:

6. Distance between A and B is m

Displacement between A and B is 2m