A truck starts from rest rolls down a hill with a constant acceleration. It travels a distance of 400 m In 20 s. Find its acceleration. Find the force acting on it if its.mass is 7 tonnes.
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Use s=ut+1/2at^2 and put u=0 and u will get a=2m/s2. Since F=ma then F=2*7*10^3N=14*10^3N
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