Physics

Problem

A stone is dropped from the top of a

45\,\text{m}

high cliff. Ignoring air resistance, what is its speed just before it reaches the ground? (Take

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

.) a)

21\,\text{m/s}

15\,\text{m/s}

30\,\text{m/s}

28\,\text{m/s}