sees a
child standing in the middle of the road and brings his vehicle to rest in 4 s
just in time to save the child.
What is the average retarding force on
the vehicle ? The mass of the three-wheeler is 400 kg and the mass of the
driver is 65 kg.
Answer:
Here 
t = 4s, m = 400 + 65 = 465 kg
As 
Magnitude of the retarding force
on the vehicle is
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