Asked by Kila

A small car has a mass of 300 kg and it is brought to rest in 4 seconds from a speed of 20 metres per second.If there is no resistance to motion,find the force exerted by the brakes
Answered by Damon
a = change in velocity/change in time

= -20/4 = -5 m/s^2

F = m a = -300*5 = -1,500 Newtons
Answered by Ronson
V=0m/s,u=20m/s,t=5s find acceleration then the required force
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