Question

A car weighting 1600kg moving with a velocity of 30 m/s retards uniformly thereby coming to rest in 20s. Calculate the
A) initial momentum
B) final momentum
C) rate of change of momentum

Answer 1

mu= 1600×30=48000

mv=1600×0=0

change in momentum=mv-mu=0-48000÷20=-2400

acceleration=-1.5

force=ma=1600×(-1.5)=2400N

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