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William lifts a load by pulling the rope...

William lifts a load by pulling the rope of a pulley system. Which force is applied by William to lift the load?

A

Magnetic

B

Muscular

C

Electrostatic

D

Gravitational

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Knowledge Check

  • Radius of one arm of hyddraulic lift is foud times off radius of other arm. What force should be applied on narrow arm to lift 100 kg?

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