A car speedling along a lvel road at 25 m/s. the brakes abruptly bring the 500 kg car to a speed of 3 m/s over a distance of 5m. determine the force applied by brakes and the workdone by the car on the brakes.
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u=25 V=3 s=5 as v^2-u^2=2as so 9-625=2×a×5 so 616/2=5a so a=60.6m/s^2 force =ma= 500×60.6 N and work = Fs..
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