An automobile travelling along a straight level road at must be brought to rest…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
An automobile travelling along a straight level road at 90km h−1 must be brought to rest within a distance of 40m to avoid hitting an obstruction.
(i) Calculate the magnitude of the uniform retardation that the brakes must be capable of producing.
(ii) For the retardation found in part (i), determine the time taken by the automobile to come to rest after the brakes are applied.