CHAPTER-5: LAWS OF MOTION

 

1. Newton’s First Law of Motion defines –

  • Energy
  • Inertia
  • Momentum of Inertia
  • Work

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

  • Force
  • Impulse
  • Acceleration
  • Momentum

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

  • First
  • Second
  • Third
  • None of these

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

  • First
  • Second
  • Third
  • None of these

6. 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.

View Answer

Newton’s Second Law of Motion

7. The product of mass and velocity is called –

  • momentum
  • force
  • impulse
  • pressure

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

  • momentum
  • force
  • impulse
  • pressure

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

  • force
  • mass
  • inertia
  • momentum

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

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

View Answer

Force of friction

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

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

View Answer

Viscous force

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

13. In the case of uniform motion acceleration is –

  • Zero
  • Negative
  • Positive
  • None of these

14. 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.

View 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

View Answer

Linear momentum

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

17. A cyclist bends while taking turn to-

View Answer

generate required centripetal force

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

View Answer

Linear momentum

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

20. Rolling friction is-

View Answer

less than sliding friction

21. Kinetic Friction is-

View Answer

Less than static friction