explain about pulley
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Answer:
a pulley is an object which take up heavy object by hook
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explain about pulley
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Pulley:-
It is a simple wooden or metallic machine that uses a wheel and rope to lift heavy loads. Nowadays, plastic pulleys are also available in the market to carry small loads.
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Types of Pulley:-
When the block of the pulley is fixed on a high platform, it is known as fixed. An extensible string passes over the groove where its one end is attached to the body to be lifted while the other end is free.
When the block of the pulley is not fixed but carries the load, it is known as Movable. An inextensible string is tied around the groove where its one end is fixed to fixed support while the other end is kept free to apply the effort. As the effort is applied, the block together with the load moves upward.
Formula for Pulley:-
Following are the formulas that are used when pulleys are used for lifting. There are formulas that are important and they are:
Example of Pulley are:-
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