Question

a car weighing 1500kg moving with a velocity of 31.5ms retards uniformly coming to rest in 25s. Calculate the (i)initial momentum (ii)final momentum (iii)magnitude of force applied

Answer 1

Answer:

v=0m/s

u=31.5m/s

t=25s

mass=1500kg

intial momentum =1500kg×31.5m/s=47250kg.m|/s

final momentum=1500×0 =0 kg.m/s

v=u+at

0m/ s=31.5m/s +a×25s

a=1.26 m/s

f=ma

f=1500×1.26

f=1890 N

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