Physics

Problem

A stone is released from rest from the top of a cliff. Downward is taken as the positive direction and

g = 10\,\text{m/s}^2

. The velocity of the stone after

2\,\text{s}

is a)

+10\,\text{m/s}

+20\,\text{m/s}

-20\,\text{m/s}

+19.6\,\text{m/s}