Question

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. $\sqrt{\frac{Fr}{m}}$
• B. $\sqrt{\frac{F}{r}}$
• C. $\sqrt{Fmr}$
• D. $\sqrt{\frac{F}{mr}}$

Answer 1

Answer: (A)

$\sqrt{\frac{Fr}{m}}$

Answer 2

Centripetal force $\left(F\right)=\frac{mv^{2}}{r}$ $\therefore v=\sqrt{\frac{Fr}{m}}$