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You wish to lift a 400 lb car engine a vertical distance of 3 ft using a strong rope. Unfortunately, your hand crank winch can only generate 100 lbs of tension in your rope. In order to overcome this obstacle, you use a multiple pulley system (block and tackle) to lift the engine.



a. What is the mechanical advantage of this system?

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thatsnice3

Answer:

You wish to lift a 400 lb car engine a vertical distance of 3 ft using a strong rope. Unfortunately, your hand crank winch can only generate 100 lb of tension in your rope. In order to overcome this obstacle, you use a multiple pulley system (block and tackle) to lift the engine. AMA = R/E AMA = 400lb/100lb AMA = 4 W = 400lbx3

Explanation:

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