A particle is acted upon by a force of constant magnitude which is always is perpendicular to the velocity of the particle , the motion of the particles takes place is a plane it follow that

Options

A. its kinetic energy is constant
B. its acceleration is constant
C. its velocity is constant
D. its moves in a straight lime

Answer

A

Explanation

(a) Work done by such force is always zero since force is acting in a direction perpencular to velocity
:. Force work - energy therefore `= delta K = 0`
k remain constant .