Question

A car of mass 480 kg moving at a speed of 54 km
h-1 is stopped by applying brakes in 10 s. Calculate
the force applied by the brakes. Ans. 720 N
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Answer 1

Answer:

Initial velocity, u = 54 km/hr = 15 m/s. ... Acceleration = Change in velocity/time. Or, a = (v - u)/t. Or, a = (0 - 15)/10 = -1.5 ms-2.