An automobile is moving at on a straight road

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

An automobile is moving at

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

on a straight road. The driver reacts and applies the brakes

0.8\,\text{s}

after seeing an obstacle. Once applied, the brakes produce a uniform retardation of

6\,\text{m s}^{-2}

. Calculate the total distance the automobile travels from the moment the driver sees the obstacle until it comes to rest.