Physics

Problem

A stone is dropped from rest from the edge of a cliff. Its velocity increases uniformly from

0

39.2\,\text{m/s}

4\,\text{s}

. Using the velocity–time information, calculate the displacement of the stone during these

4\,\text{s}

. a)

156.8\,\text{m}

39.2\,\text{m}

78.4\,\text{m}

80\,\text{m}