Pulley: This simple
machine is made up of a wheel and a rope. The rope fits on the
groove of the wheel. One part of the rope is attached to the
load. When you pull on one side of the pulley, the wheel turns
and the load will move. Pulleys let you move loads up, down, or
sideways. Pulleys are good for moving objects to hard to reach
places. It also makes the work of moving heavy loads a lot
This crane uses a pulley to move the heavy wrecking ball. Without the use of a pulley, the wrecking ball would be very hard to move.
Examples of where pulleys can be used:
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