Do pulleys and gears have friction?
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Gear systems with more than one spur gear in the interior are called planetary gear drives. Internal gears are common in pencil sharpeners and pump systems. Pulleys are another type of simple machine that is often used to help lift loads. ... When the rope passes through the wheel of the pulley, friction is reduced.
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Yes,pulleys and gears have less friction.They help in reducing friction,yet some small friction still will be there.
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