Physics

Problem

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

20\,\text{m}

high. What will be its speed when it is

10\,\text{m}

above the ground? (Take

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

) a)

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

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

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

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