Physics

Problem

A stone tied to a string

2.0\,\text{m}

long is whirled in a horizontal circle at a constant speed of

4.0\,\text{m s}^{-1}

. Calculate the magnitude of its centripetal acceleration. a)

9.8\,\text{m s}^{-2}

8.0\,\text{m s}^{-2}

16\,\text{m s}^{-2}

2.0\,\text{m s}^{-2}