Chapter-3: Motion In A Straight Line

Chapter-3: Motion In A Straight Line

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

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Total path length[/su_spoiler]

2. The SI unit of acceleration is –

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]m/s²[/su_spoiler]

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

  • Displacement
  • Acceleration
  • Velocity
  • None of these

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Acceleration [/su_spoiler]

4. The rate of change of displacement –

  • Speed
  • Acceleration
  • Velocity
  • Distance

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Gravitational force [/su_spoiler]

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

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Change in velocity [/su_spoiler]

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]15 km/h[/su_spoiler]

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]40 m/s[/su_spoiler]

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

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Instantaneous Speed [/su_spoiler]

9. Odometer measures –

  • Speed
  • Distance
  • Time
  • Average speed

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Distance[/su_spoiler]

10. Negative acceleration is called –

  • Uniform acceleration
  • Variable acceleration
  • Retardation
  • Acceleration

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Retardation[/su_spoiler]

11. Area under Speed – Time graph represents –

  • Distance
  • Average acceleration
  • Acceleration
  • None of these

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Distance[/su_spoiler]

12. Area under the force-displacement curve represents –

  • Velocity
  • Acceleration
  • Impulse
  • Workdone

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Workdone [/su_spoiler]

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

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]will be increasing[/su_spoiler]

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

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]uniform acceleration[/su_spoiler]

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

  • Kinetic energy
  • Velocity
  • Momentum
  • Acceleration

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Acceleration[/su_spoiler]

16. In circular motion –

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

[su_spoiler title=”answer” style=”fancy” icon=”caret”]The direction of motion changes continuously[/su_spoiler]