Posted by **shkell** on Tuesday, April 23, 2013 at 12:03am.

Two 80n children sit together 3m from the center of a teeter-totter and are able to lift 460n that is 1m away from the fulcrum. name the simple machine that is being used inthe problem, calculate the work in,work out mechanical advantage, and the efficinency of this machine.

assume the children are the input.

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