Physics

Problem

Which of the following gives the magnitude of the centripetal force acting on a body of mass

m

moving with linear speed

v

along a circle of radius

r

? a)

\displaystyle \tfrac{1}{2}\,\frac{m v^{2}}{r}

\displaystyle \frac{m v^{2}}{r}

\displaystyle 2\,\frac{m v^{2}}{r}

\displaystyle \pi\,\frac{m v^{2}}{r}