Physics

Problem

A stone is released from rest from the edge of a cliff and falls freely. What is its speed after it has fallen

20\,\text{m}

? (Take

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

.) a)

9.9\,\text{m/s}

28\,\text{m/s}

19.8\,\text{m/s}

14\,\text{m/s}