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a first class lever in static equilibrium has a 50 lb resistance force and 15lb effort force. the lever's effort force is 4ft from the fulcrum. whats...

a first class lever in static equilibrium has a 50 lb resistance force and 15lb effort force. the lever's effort force is 4ft from the fulcrum. whats the AMA of this lever? 1.1.2 simple machine problems

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