Chapter-5: Laws Of Motion

1. Newton’s First Law of Motion defines –

  • Energy
  • Inertia
  • Momentum of Inertia
  • Work

answer
Inertia 

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

  • Force
  • Impulse
  • Acceleration
  • Momentum

answer
Force

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

  • First
  • Second
  • Third
  • None of these

answer
First

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

  • First
  • Second
  • Third
  • None of these

answer
Third

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.

answer
Newton’s Second Law of Motion

6. The product of mass and velocity is called –

  • momentum
  • force
  • impulse
  • pressure

answer
momentum

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

  • momentum
  • force
  • impulse
  • pressure

answer
Impulse

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

  • force
  • mass
  • inertia
  • momentum

answer
inertia

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

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

answer
Force of friction

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

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

answer
Viscous force

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

answer
1 N

12. In the case of uniform motion acceleration is –

  • Zero
  • Negative
  •  Positive
  • None of these

answer
Zero

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.

answer
Opposite to the direction of motion of an object

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

  • Mass
  • Linear momentum
  • Energy
  • Angular momentum

answer
Linear momentum

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

  • Energy
  • Power
  • Velocity
  • Momentum

answer
Momentum

16. A cyclist bends while taking turn to-

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

answer
generate required centripetal force

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

  • Mass
  • Energy
  • Linear momentum
  • Angular momentum

answer
Energy

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

  • Energy
  • Power
  • Moment
  • Velocity

answer
Moment

19. Rolling friction is-

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

answer
less than sliding friction

20. Kinetic Friction is-

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

answer
Less than static friction

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