A particle of mass m moves with constant speed along a circular path of radius r under the action of a force F. Its speed is

Options

(a) √rF/m
(b) √F/r
(c) √Fmr
(d) √F/mr

Correct Answer:

√rF/m

Explanation:

The centripetal force is F=mv²/r
.·. v²=Fr/m
The speed is v= √Fr/m