Transcription: In this example, we're analyzing the situation in which a first class lever is used to move a rock. According to the example, the rock is five inches from the fulcrum of the lever. Well, let's picture this. The fulcrum is the point at which the lever does not move. That's that little brown circle that the lever's resting up against. So that's the fulcrum, and the rock is five inches from that. Also according to the example, the effort, the place in which the person is pushing down on the lever, that is 100 100 inches from the fulcrum. So let's picture that. Once again, the fulcrum is where the ...
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