Chapter-5: Laws Of Motion

Chapter-5: Laws Of Motion

1. Newton’s First Law of Motion defines –

  • Energy
  • Inertia
  • Momentum of Inertia
  • Work

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

2. Measurement of which quantity is obtained through Newton’s 2nd law of motion? –

  • Force
  • Impulse
  • Acceleration
  • Momentum

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

3. Which law of motion of Newton’s defines force?

  • First
  • Second
  • Third
  • None of these

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

4. To every action, there is an equal and opposite reaction which law of motion is this?

  • First
  • Second
  • Third
  • None of these

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

5. Newton’s which law is the real law of motion –

  • Newton’s First Law of Motion
  • Newton’s Second Law of Motion
  • Newton’s Third Law of Motion
  • None of these.

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Newton’s Second Law of Motion[/su_spoiler]

6. The product of mass and velocity is called –

  • momentum
  • force
  • impulse
  • pressure

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

7. The product of force and time which equals the change in momentum is called –

  • momentum
  • force
  • impulse
  • pressure

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

8. All objects resist a change in their state. It is called –

  • force
  • mass
  • inertia
  • momentum

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

9. Which of the following is not a conservative force?

  • Force of friction
  • Magnetic force
  • Gravitational force
  • Electrostatic force

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Force of friction[/su_spoiler]

10. Which of the following is a non-conservative force?

  • Interatomic force
  • Gravitational force
  • Electrostatic force
  • Viscous force

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

11. An object of mass 2kg is moving with the acceleration of 50 cm/s, Then force acting on it is –

  • 1 N
  • 10 N
  • 100 N
  • 25 N

[su_spoiler title=”answer” style=”fancy” icon=”caret”]1 N[/su_spoiler]

12. In the case of uniform motion acceleration is –

  • Zero
  • Negative
  •  Positive
  • None of these

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

13. The direction of the force of friction –

  • Perpendicular to the direction of motion of an object
  • Along the direction of motion of an object
  • Opposite to the direction of motion of an object
  • None of these.

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Opposite to the direction of motion of an object[/su_spoiler]

14. A jet engine works on the principle of conservation of –

  • Mass
  • Linear momentum
  • Energy
  • Angular momentum

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

15. The units of impulse are the same as those of –

  • Energy
  • Power
  • Velocity
  • Momentum

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

16. A cyclist bends while taking turn to-

  • reduce friction
  • generate required centripetal force
  • reduce apparent weight
  • reduce speed.

[su_spoiler title=”answer” style=”fancy” icon=”caret”]generate required centripetal force[/su_spoiler]

17. Rocket propulsion is based on the principle of conservation of-

  • Mass
  • Energy
  • Linear momentum
  • Angular momentum

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

18. Which physical quantity have the same unit as that of impulse?

  • Energy
  • Power
  • Moment
  • Velocity

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

19. Rolling friction is-

  • less than sliding friction
  • more than sliding friction
  • equal to sliding friction
  • None of these.

[su_spoiler title=”answer” style=”fancy” icon=”caret”]less than sliding friction[/su_spoiler]

20. Kinetic Friction is-

  • Less than static friction
  • More than static friction
  • Equal to static friction
  • None of these

[su_spoiler title=”answer” style=”fancy” icon=”caret”]Less than static friction[/su_spoiler]