Question

A particle of mass $m$ is observed from an inertial frame of reference and is a circle of radius $r$ with a uniform speed $v$. The centrifugal force on it is:

• A. $\frac{m{v}^2}{r}$ towards the centre
• B. $\frac{m{v}^2}{r}$ away from the centre
• C. $\frac{m{v}^2}{r}$ along the tangent through the particle
• D. Zero

Answer 1

The correct option is D Zero

Centrifugal force which is a fictitious force only arise when the observer 's frame of reference. Since the particle is being observed from an inertial frame, centrifugal force on it is zero.