Question

A particle is acted upon by a force of constant magnitude which is always perpendiculr to the velocity of the particle. The motion of the particle takes place in a plane. It follows that
A. its velocity is constant
B. its acceleration is constant
C. its kinetic energy is constant
D. it moves in a straight line

Answer 1

Correct Answer - C
When the force is perpendicular to the velocity, the force change direction of velocity not its magnitude and `K.E`. Is constant