A bus is moving with a velocity of 40m/s. A force of 1000 N is applied and it comes to
rest in 5s. calculate the a) retardation b) mass of the bus c) change in momentum
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Answer:
acceleration = 40/5
= 8 ms^-2
retardation = negative acceleration
= -8 ms^-2
m = F/a
= 1000/8
= 125 kg
momentum, p = mv
= 125×40
= 5000 m²s^-1
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