# 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.

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

Force of friction

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

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

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.

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

Linear momentum

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

• Energy
• Power
• Velocity
• Momentum

17. A cyclist bends while taking turn to-

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

generate required centripetal force

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

• Mass
• Energy
• Linear momentum
• Angular momentum

Linear momentum

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

• Energy
• Power
• Moment
• Velocity

20. Rolling friction is-

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

less than sliding friction

21. Kinetic Friction is-

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