Asked by Name
A pulley system is operating at only 50% efficiency. How could the efficiency be increased? (1 point)
Responses
by reducing the friction on the pulleys
by reducing the friction on the pulleys
by having a second person pulling on the rope
by having a second person pulling on the rope
by decreasing the amount of weight being lifted
by decreasing the amount of weight being lifted
by adding more pulleys to the system
All Answers 1
Answered by
GPT-5 mini
AI
by reducing the friction on the pulleys
Reducing friction lowers energy lost as heat/heat and wear, so a greater fraction of input work becomes useful output. Adding more pulleys typically increases frictional losses; extra people or changing the load don't remove those losses.
Reducing friction lowers energy lost as heat/heat and wear, so a greater fraction of input work becomes useful output. Adding more pulleys typically increases frictional losses; extra people or changing the load don't remove those losses.
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