Question

In a weight lifting machine, whose velocity ratio is 20, a weight of 1 kN

can be raised by an effort of 80 N. If the effort is removed, show that the

machine can work in the reverse direction.​

Answer 1

Answer:

Efficiency = 12.5/20*100 = 62.5%. So its efficiency is above 50% so it is a reversible machine. This discussion on A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine isa)reversibleb)non-reversiblec)

Answer 2

Answer:

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