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Question:

How does cranes make use of simple machines?

So how does tower cranes and cranes used in constructions make use of mechanical advantage exerted from simple machines such as pulleys and levers?In other words, how does a crane use pulleys and levers?

Answer:

Well, think about it. The cables of the crane pass over pulley. That's one simple machine right there. In addition, one that not everybody would think is a lever. On the back of the crane, there is a huge weight. The purpose of this is to compensate for what is being picked up at the front of the crane. Having a very heavy weight on the back of the crane allows a load to be picked up far forward at the front of the crane. Otherwise, it would topple over and people would die. And that would be bad.
Is A Crane A Pulley
a crane has a pulley in order to reduce the workload. Each time there is a loop of the pulley made the workload is reduced.

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