If a body is moving with constant speed, then its acceleration

Options

A. must be non-zero
B. must be zero
C. may be non-zero and constant
D. may be non-zero and variable.

Answer

d

Explanation

When acceleration of a particle is zero then it moves with constant speed but the speed may remain constant even if the acceleration is non zero, for example acceleration of the particle moving in a circular path with constant speed is non-zero and variable because the direction of acceleration continously changes.