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Question
A particle of mass m is observed from an inertial frame of reference and is found to move in a circle of radius r with a uniform speed v. The centrifugal force on it is
Options
\[\frac{\text{mv}^2}{\text{r}}\] towards the centre
\[\frac{\text{mv}^2}{\text{r}}\] away from the centre
\[\frac{\text{mv}^2}{\text{r}}\] along the tangent through the particle
zero
Solution
zero
The centrifugal force is a pseudo force and can only be observed from the frame of reference, which is non-inertial w.r.t. the particle.
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