Question

a car weighing 1600 kg moving with a velocity of 30m/sec retards uniformly coming to rest in 20 sec calculate
1) initial momentum,2) final momentum,3)rate of change of momentum,4)acceleration of the car and 5) magnitude of the force applied
Please help out.....with all the steps

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

Answer 2

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