question_answer

In uniform circular motion, the factor that remains constant is

A)  acceleration     

B)  momentum

C)  kinetic energy

D)  linear velocity

Correct Answer: C

Solution :

                 The energy possessed by a body due to velocity (v) is known as kinetic energy of the body. When a body is projected with velocity v at an angle \[\theta \] with the horizontal, then kinetic energy (KE) of projection = kinetic energy of returning.                 Since, velocity of projection is equal to velocity of return. Hence, change in kinetic energy is zero.