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 constant force $\overrightarrow{F}$  is acting on a particle having velocity $\overrightarrow{V}$  such

that $\overrightarrow{F}\perp \overrightarrow{V}$  as shown

Here we observe.

Option (a) is not supporting the situation because velocity vector is

continuously changing its direction.

Option (b) is also not supporting again we get $\overrightarrow{a}$  vector also not

constant it is also changing its direction.

Option (c) correctly concluding about K.E.

Here particle perform uniform circular motion.

So we get K.E. = constant ($\because$  m, v are constant)

Option (d) is also correctly concluding the path traced by the particle

Since $\overrightarrow{F}\perp \overrightarrow{V}$  and $\overrightarrow{F}$  is constant force.

Obviously particle perform uniform circular motion.

Ans:  d