Question

A truck start from a rest an rolls down a hill with a contract acceleration it travelled a distance of 400 Meter in 20 seconds find its acceleration and also find the force acting on it if the mass is 7000kg.

Answer 1

u = 0
s = 400m
t = 20s
s = ut +1/2 at*t
400 = 0*20 +1/2*a*20*20
400= 1/2*400a
400a = 400*2
a = 2

F=ma
F= 7000*2
F = 14000N

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