How far to the nearest tenth of a meter can a runner running at 15 m/s run in the time it takes a rock to fall from rest 76 meters?

Answer 1

d=vit + 1/2at^2

You know d, vi, and a, so solve for t, the time it takes the rock to hit the ground.

Multiply that time by the runner's velocity to find how far he can run in the time it takes the rock to fall from 76 meters.