# Motion in a Straight Line

1. Out of the following, which cannot be negative?

• Total path length
• Velocity
• Acceleration
• None of these.

Total path length

2. The SI unit of acceleration is –

• m/s
• m/s²
• cm/sec²
• None of these

3. The rate of change in velocity with time is called –

• Displacement
• Acceleration
• Velocity
• None of these

4. The rate of change of displacement –

• Speed
• Acceleration
• Velocity
• Distance

5. The area under acceleration – time graph represents the –

• Initial velocity
• Final velocity
• Change in velocity
• distance traveled.

Final velocity

6. Two cars A and B are running at velocities of 60 km/h and 45 km/h. What is the relative velocity of car A with respect to car B, if both are moving eastward?

• 15 km/h
• 45 km/h
• 60 km/h
• 105 km/h

7. A body starts from 20 m/s. If its acceleration is 2 m/s². then the velocity of the body after 10 seconds is –

• 40 m/s
• 20 m/s
• 30 m/s
• 10 m/s

8. What does the speedometer of a vehicle read/measure? –

• Average Speed
• Average Velocity
• Instantaneous Speed
• Instantaneous Velocity

Instantaneous Speed

9. Odometer measures –

• Speed
• Distance
• Time
• Average speed

10. Negative acceleration is called –

• Uniform acceleration
• Variable acceleration
• Retardation
• Acceleration

Retardation

11. Area under Speed – Time graph represents –

• Distance
• Average acceleration
• Acceleration
• None of these

12. Area under the force-displacement curve represents –

• Velocity
• Acceleration
• Impulse
• Workdone

13. A body is moving with uniform acceleration. Its velocity –

• will be increasing
• will be decreasing
• will be uniform
• will increase first and decrease afterward

will be increasing

14. A force is acting on a body. The body will move with –

• uniform velocity
• uniform acceleration
• uniform retardation
• None of these

uniform acceleration

15. If a uniform force is acted upon a body which of the following remains constant?

• Kinetic energy
• Velocity
• Momentum
• Acceleration

16. In circular motion –

• The direction of motion is fixed
• The direction of motion changes continuously
• Acceleration is zero
• None of these