What does the mechanical advantage of a first class lever depend upon? Describe how it can be changed.

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Solution

The mechanical advantage of a first class lever depends upon the placement of the fulcrum. If the fulcrum is closer to the load than to the input force, the lever has a MA > 1. If the fulcrum is exactly in the middle of the load and the input force, the MA = 1. If the fulcrum is closer to the input force than to the load, the lever's MA < 1.

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