The efficiency of a pulley system could be increased by reducing the friction on the pulleys. Reducing friction means less energy is lost to frictional forces, allowing more of the input energy to be used for lifting the load.
A pulley system is operating at only 50% efficiency. How could the efficiency be increased? (1 point)
Responses
by adding more pulleys to the system
by adding more pulleys to the system
by decreasing the amount of weight being lifted
by decreasing the amount of weight being lifted
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
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