A stone is dropped from rest from the top of a high cliff

PHYSICS · Single correct · GCSE · Physics · Forces · Forces

Problem

A stone is dropped from rest from the top of a

45\,\text{m}

high cliff. Taking

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

, what is its speed just before it hits the ground? (a)

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

(b)

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

(c)

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

(d)

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