Question

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that

• A. Velocity is constant
• B. Acceleration is constant
• C. Kinetic energy is constant
• D. It moves in a circular path

Answer 1

Answer: (C), (D)

The correct options are
C Kinetic energy is constant
D It moves in a circular path

In the given condition, the particle undergoes uniform circular motion and for uniform circular motion the velocity and acceleration vector changes continuously but kinetic energy is constant for every point.