a car of mass 1000kg travelling at 20 ms^1 crashes on a brick wall and comes to rest in 0.05seconds calculate the average force exerted by the wall on the car
ans in detail
the final ans is 4000N
icse class 9
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a=v-u/t =0-20/0.05 =-400m/s^2 f=ma =1000 ×-400 =-400000N
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