Physics

Problem

A stone is projected vertically upward from the edge of a cliff

50\,\text{m}

high with an initial speed of

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

. Neglect air resistance and take upward as positive with

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

downward. The time taken by the stone to reach the ground at the base of the cliff is closest to a)

3.2\,\text{s}

5.8\,\text{s}

4.6\,\text{s}

2.2\,\text{s}