Question

a mass of body 5kg starts and roll down 32 meter of an inclined plane in 4 seconds. find the force acting on the body

Answer 1

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Mass of stone(m)=7000 kg

Distance(S)=400 meter

Time(t)=20 second

1) We have to find the acceleration of the truck

So from the equation of motion S=ut+21a×t2, whereu=0

 S=21a×t2

a=t22×S=20×202×400=2sec2m

2) Force acting on truck

So,from newton's 2nd law of motion

F=ma=7000×2=14000N=14kN

So ur answer is 14kN