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A pulley system is helpful because it decreases the ______________________.

A. amount of effort needed to lift an object
B. amount of rope needed to lift an object
C. weight of the object
D. height that the object needs to be lifted

Help plz 20 points ....

Respuesta :

Answer:

a. pulley system reduces amount of effort to lift a object.

Explanation:

pulley system can be used to change the direction of force to lift an object if we use more than one pulley it can be used to lift the load easily

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Answer:

A. amount of effort needed to lift an object

Explanation:

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