Newton’s Laws of Motion MCQs

1. Newton’s First Law of Motion is also known as:
(A) Law of Acceleration
(B) Law of Inertia
(C) Law of Action and Reaction
(D) Law of Force

2. Newton’s First Law states that an object at rest will stay at rest unless:
(A) It gains mass
(B) A net external force acts on it
(C) It loses energy
(D) It changes its shape

3. Which of the following is an example of Newton’s First Law?
(A) A ball rolling on the ground eventually stops due to friction
(B) A rocket launching into space
(C) A car accelerating on a highway
(D) A swimmer pushing water backward to move forward

4. Newton’s Second Law of Motion is represented by which formula?
(A) F = ma
(B) P = mv
(C) W = mg
(D) F = m/v

5. According to Newton’s Second Law, if the force applied to an object is doubled while its mass remains constant, its acceleration will:
(A) Remain the same
(B) Double
(C) Be halved
(D) Reduce to zero

6. Newton’s Third Law of Motion states that:
(A) Every action has an equal and opposite reaction
(B) Force equals mass times acceleration
(C) Objects in motion remain in motion
(D) An object at rest stays at rest

7. Which of the following is an example of Newton’s Third Law?
(A) A book resting on a table
(B) A car accelerating on a highway
(C) A person pushing against a wall and feeling a push back
(D) A parachute slowing down a skydiver

8. If a 10 kg object is accelerating at 5 m/s², what is the force acting on it?
(A) 2 N
(B) 10 N
(C) 50 N
(D) 100 N

9. Which force is responsible for bringing a moving car to rest when brakes are applied?
(A) Gravitational Force
(B) Frictional Force
(C) Magnetic Force
(D) Centripetal Force

10. What happens to an object in motion when no external force acts on it?
(A) It stops immediately
(B) It moves with constant velocity
(C) It accelerates
(D) It slows down gradually

11. A gun recoils backward when a bullet is fired. This is an example of:
(A) Newton’s First Law
(B) Newton’s Second Law
(C) Newton’s Third Law
(D) Law of Universal Gravitation

12. A cricket player lowers his hands while catching a ball to:
(A) Increase momentum
(B) Reduce force by increasing time of impact
(C) Increase the force on the ball
(D) Change the direction of the ball

13. If a person jumps out of a boat, the boat moves backward. This is due to:
(A) Newton’s First Law
(B) Newton’s Second Law
(C) Newton’s Third Law
(D) Gravitational Force

14. If two objects of different masses are dropped from the same height in the absence of air resistance, they will:
(A) Fall at different speeds
(B) Fall at the same speed
(C) Stop midway
(D) Float in the air

15. A truck and a car have the same velocity, but the truck has more momentum because:
(A) It has more mass
(B) It has more acceleration
(C) It has more speed
(D) It has less inertia

16. The SI unit of force is:
(A) Joule
(B) Newton
(C) Pascal
(D) Watt

17. A force of 20 N is applied to a 4 kg object. What is its acceleration?
(A) 4 m/s²
(B) 5 m/s²
(C) 10 m/s²
(D) 20 m/s²

18. Why does a person feel a backward push when a bus suddenly moves forward?
(A) Due to Newton’s Third Law
(B) Due to inertia (Newton’s First Law)
(C) Due to acceleration (Newton’s Second Law)
(D) Due to friction

19. What is the reaction force to the Earth pulling an object downward due to gravity?
(A) The object pulling the Earth upward
(B) Friction
(C) Air resistance
(D) No reaction force exists

20. Why do passengers lurch forward when a moving bus suddenly stops?
(A) Due to Newton’s Third Law
(B) Due to inertia (Newton’s First Law)
(C) Due to increased acceleration
(D) Due to an unbalanced force