*[ Physics ]*
Three pulleys are to be used to lift a 1000N load from the ground to the top floor of a building 40.0m high. Draw an arrangement of the pulleys showing the windings . Given that the efficiency of the machine is 72.0% , calculate the :
1. Velocity ratio
2. Effort required
3. The total energy not used for any useful work. Suggest reasons why there must be loses in energy for this kind of machine.
Answers: 1
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Three pulleys are to be used to lift a 1000N load from the ground to the top floor of...
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