1.A 56g particle is moving to the left at 24m/s . How much net work must...

Question

Question

1.A 56g particle is moving to the left at 24m/s . How much net work must be done on the particle to cause it to move to the right at 48m/s ?

2.How much work does an elevator motor do to lift a 1300kg elevator a height of 140m ?

How much power must the motor supply to do this in 56s at constant speed?

Answer 1

Answer #1

The change in momentum is, (56 10 kg)48 m/s)-(24 m/s)] = 4.032 kg.m/s Use the work-kinetic energy theorem, the amount of requ

Answer 2

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