A stone tied to a string long is whirled in a horizontal circle at a constant speed of

PHYSICS · Single correct · CBSE · Physics · Motion · Motion

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}

(b)

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

(c)

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

(d)

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