MCQs
1. A force can:
A. Only change shape
B. Only stop motion
C. Change speed, direction, or shape of an object
D. Only increase mass
Answer: C
2. Force is a:
A. Scalar quantity
B. Vector quantity
C. Dimensionless quantity
D. Constant quantity
Answer: B
3. The SI unit of force is:
A. Joule
B. Newton
C. Pascal
D. Watt
Answer: B
4. Balanced forces acting on an object:
A. Always change its velocity
B. Produce acceleration
C. Result in zero net force
D. Increase momentum
Answer: C
5. In tug of war, the rope moves when:
A. Forces are balanced
B. Forces are equal
C. Forces are unbalanced
D. No force acts
Answer: C
6. Two opposite forces of 12 N and 7 N act on an object. The net force is:
A. 19 N
B. 5 N
C. 12 N
D. 7 N
Answer: B
7. Friction acts:
A. In the direction of motion
B. Opposite to motion
C. Vertically upward
D. Along gravity
Answer: B
8. The force exerted by a surface perpendicular to it is called:
A. Frictional force
B. Buoyant force
C. Normal force
D. Magnetic force
Answer: C
9. If friction suddenly disappears, a moving object would:
A. Stop immediately
B. Move forever with constant velocity
C. Fall down
D. Lose mass
Answer: B
10. The force required to keep an object moving in real life mainly overcomes:
A. Gravity
B. Magnetism
C. Friction
D. Buoyancy
Answer: C
11. Newton’s first law is also called the law of:
A. Gravitation
B. Momentum
C. Inertia
D. Acceleration
Answer: C
12. Inertia is the tendency of an object to:
A. Increase speed
B. Resist changes in motion
C. Attract other objects
D. Rotate continuously
Answer: B
13. According to Newton’s first law, if net force is zero, an object:
A. Must stop moving
B. Must accelerate
C. Remains at rest or moves with constant velocity
D. Changes direction
Answer: C
14. A moving object with constant velocity has:
A. Zero net force
B. Infinite force
C. Constant acceleration
D. Changing momentum
Answer: A
15. Newton’s second law relates:
A. Force and temperature
B. Force, mass, and acceleration
C. Velocity and pressure
D. Energy and power
Answer: B
16. According to Newton’s second law:
A. F = ma
B. F = mv
C. F = m/v
D. F = a/m
Answer: A
17. For a fixed mass, acceleration increases when:
A. Force decreases
B. Force increases
C. Velocity decreases
D. Time increases
Answer: B
18. For the same force, acceleration is:
A. Directly proportional to mass
B. Inversely proportional to mass
C. Equal to mass
D. Independent of mass
Answer: B
19. One newton is the force required to produce acceleration of:
A. 1 m/s on 1 kg mass
B. 1 m/s² on 1 kg mass
C. 1 m/s² on 10 kg mass
D. 10 m/s² on 1 kg mass
Answer: B
20. The acceleration due to gravity on Earth is approximately:
A. 5 m/s²
B. 8 m/s²
C. 9.8 m/s²
D. 20 m/s²
Answer: C
21. Weight of an object is:
A. Mass × volume
B. Mass × gravity
C. Force ÷ mass
D. Velocity × time
Answer: B
F=mg
22. A cricket fielder pulls hands backward while catching the ball to:
A. Increase force
B. Increase acceleration
C. Reduce impact force
D. Increase momentum
Answer: C
23. Airbags reduce injuries because they:
A. Increase acceleration
B. Increase stopping time
C. Increase mass
D. Reduce velocity instantly
Answer: B
24. Newton’s third law states:
A. F = ma
B. Every action has equal and opposite reaction
C. Force is proportional to velocity
D. Objects remain at rest forever
Answer: B
25. Action and reaction forces:
A. Cancel each other always
B. Act on same object
C. Act on different objects
D. Have different magnitudes
Answer: C
26. While walking, we move forward because:
A. We pull air backward
B. Ground pushes us forward through friction
C. Gravity pushes us ahead
D. Shoes attract the floor
Answer: B
27. Grooves in shoe soles mainly:
A. Increase weight
B. Reduce acceleration
C. Increase friction
D. Reduce pressure
Answer: C
28. A rocket moves upward because:
A. Air pushes it upward only
B. Exhaust gases push downward
C. Gravity becomes zero
D. Friction disappears
Answer: B
29. In a gun recoil, the gun moves backward due to:
A. Friction
B. Newton’s second law only
C. Newton’s third law
D. Gravity
Answer: C
30. Momentum depends on:
A. Mass and velocity
B. Force and acceleration
C. Time and displacement
D. Energy and power
Answer: A
Assertion–Reason MCQs
31.
Assertion (A): Force is a vector quantity.
Reason (R): Force has both magnitude and direction.
A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true but R is false
D. A is false but R is true
Answer: A
32.
Assertion (A): Friction opposes motion.
Reason (R): Friction acts opposite to the direction of motion.
A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true but R is false
D. A is false but R is true
Answer: A
33.
Assertion (A): A body moving with constant velocity has zero acceleration.
Reason (R): Its velocity does not change with time.
A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true but R is false
D. A is false but R is true
Answer: A
34.
Assertion (A): Action and reaction forces do not cancel each other.
Reason (R): They act on different objects.
A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true but R is false
D. A is false but R is true
Answer: A
Case-Based MCQs
Case Study 1
A student pushes a wooden block on a rough floor. The block slows down and finally stops after some distance.
35. Which force mainly stops the block?
A. Magnetic force
B. Gravitational force
C. Frictional force
D. Electrostatic force
Answer: C
36. Friction acts:
A. Along motion
B. Opposite to motion
C. Upward only
D. Randomly
Answer: B
37. If the floor were perfectly smooth, the block would:
A. Stop immediately
B. Move forever with constant velocity
C. Accelerate upward
D. Lose mass
Answer: B
Case Study 2
A canoeist pushes water backward with a paddle, causing the canoe to move forward.
38. Which law explains this motion?
A. Newton’s first law
B. Newton’s second law
C. Newton’s third law
D. Law of gravitation
Answer: C
39. The forward motion of canoe occurs because:
A. Water pulls canoe forward
B. Water exerts equal and opposite force on paddle
C. Gravity pushes canoe
D. Friction disappears
Answer: B
Competency-Based MCQs
40. A heavier cart and a lighter cart are pushed with the same force. Which will accelerate more?
A. Heavier cart
B. Both equally
C. Lighter cart
D. Neither
Answer: C
41. A person standing in a bus falls backward when the bus suddenly starts moving. This is due to:
A. Gravity
B. Inertia
C. Momentum
D. Friction only
Answer: B
42. Why are treads provided on tyres?
A. To reduce mass
B. To increase friction
C. To increase speed only
D. To reduce pressure
Answer: B
43. Which quantity changes when a net force acts on an object?
A. Inertia
B. Mass only
C. Velocity
D. Density
Answer: C
44. A force of 20 N acts on a body of mass 5 kg. Its acceleration is:
A. 2 m/s²
B. 4 m/s²
C. 5 m/s²
D. 10 m/s²
Answer: B
45. Which statement about balanced forces is correct?
A. They always produce acceleration
B. They produce non-zero net force
C. They do not change state of motion
D. They increase momentum
Answer: C
46. Why is it difficult to walk on ice?
A. Gravity decreases
B. Friction is very small
C. Mass increases
D. Air resistance increases
Answer: B
47. A rocket can move in space because:
A. Air pushes it
B. Space contains friction
C. Exhaust gases provide reaction force
D. Gravity is absent
Answer: C
48. Which quantity remains constant if no net force acts?
A. Acceleration only
B. Velocity
C. Force
D. Mass only
Answer: B
49. A body of mass 2 kg has acceleration 3 m/s². Force acting on it is:
A. 1.5 N
B. 5 N
C. 6 N
D. 9 N
Answer: C
50. Which statement BEST explains Newton’s third law?
A. Only moving objects exert force
B. Forces always act alone
C. Forces occur in equal and opposite pairs
D. Force is proportional to velocity
Answer: C
