Q. A particle of mass $m$ moves with constant speed along a circular path of radius $r$ under the action of force $F$. Its speed is
A) $\sqrt{Fr/m}$
B) $\sqrt{F/r}$
C) $\sqrt{F\ m\ r}$
D) $\sqrt{F/mr}$
Explanation
(a) $F = \frac{mv^{2}}{r}$ or $v = \sqrt{\frac{Fr}{m}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.