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1.
PULLEYS
A pulley is a simple machine that uses grooved wheels and a rope to raise, lower or move a load.
2.
PULLEYS
Now if you add more wheels, and loop the rope around them, you can reduce the effort you need to lift the weight.
3.
PULLEYS
A sail is an example of when we use a pulley
4.
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5.
PULLEYS
A blind is an example of a pulley.
Alegra Weber
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