41. If an object falls freely under gravity, its acceleration is:
a) 0 m/s²
b) 9.8 m/s²
c) 4.9 m/s²
d) 20 m/s²
Answer: b) 9.8 m/s²
42. A train moving with a velocity of 40 m/s is brought to rest in 10 seconds. What is its acceleration?
a) -2 m/s²
b) -4 m/s²
c) -6 m/s²
d) -8 m/s²
43. If an object is moving with constant velocity, its acceleration is:
a) Zero
b) Infinite
c) Increasing
d) Decreasing
44. The first equation of motion is derived using:
a) Graphical method
b) Newton’s laws
c) Work-energy theorem
d) Impulse-momentum theorem
45. What is the displacement of an object after 4 seconds if it starts from rest with an acceleration of 2 m/s²?
a) 8 m
b) 12 m
c) 16 m
d) 20 m
46. Which of the following conditions is necessary for using equations of motion?
a) Variable acceleration
b) Uniform acceleration
c) Constant velocity
d) No acceleration
47. If an object covers equal distances in equal intervals of time, it is moving with:
a) Uniform velocity
b) Uniform acceleration
c) Non-uniform acceleration
d) Zero velocity
48. A ball is thrown upward with a velocity of 50 m/s. What is the maximum height it will reach? (Take g = 10 m/s²)
a) 100 m
b) 125 m
c) 150 m
d) 200 m
49. If an object accelerates uniformly from rest, its final velocity is directly proportional to:
a) Time
b) Square of time
c) Displacement
d) Square of displacement
50. If a car moving at 20 m/s comes to rest in 5 seconds, what is the distance traveled before stopping?
a) 25 m
b) 50 m
c) 75 m
d) 100 m