31.. Which of the following is NOT an equation of motion?
a) First
b) Second
c) third
d) Fourth
32. The first equation of motion gives the relation between:
a) Displacement, velocity, and acceleration
b) Velocity, time, and acceleration
c) Distance, speed, and acceleration
d) Force, mass, and acceleration
33. What does the variable ‘u’ represent in the equations of motion?
a) Final velocity
b) Initial velocity
c) Acceleration
d) Displacement
34. The first equation is used to find:
a) Final Velocity
b) Initial Velocity
c ) Displacement
d) None of these
35. The unit of acceleration in SI system is:
a) m/s
b) m/s²
c) km/h²
d) cm/s
Answer: b) m/s²
36. If a car starts from rest and attains a velocity of 20 m/s in 4 seconds, what is its acceleration?
a) 5 m/s²
b) 4 m/s²
c) 6 m/s²
d) 2 m/s²
Answer: a) 5 m/s²
37. If an object moves with uniform acceleration, which of the following is true?
a) Velocity is constant
b) Acceleration is zero
c) The velocity changes at a uniform rate
d) Displacement remains the same
38. The third equation of motion can be used when:
a) Time is not given
b) Initial velocity is zero
c) Acceleration is zero
d) Distance is unknown
39. A body is thrown vertically upward with a velocity of 30 m/s. How long will it take to reach the highest point? (Take g = 10 m/s²)
a) 2 s
b) 3 s
c) 4 s
d) 5 s
40. The second equation of motion is used to find:
a) Velocity
b) Time
c) Distance covered
d) Acceleration