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Harper Wilson——Studied at the University of São Paulo, Lives in São Paulo, Brazil.
A nutcracker is an example of a second-class lever. The fulcrum in the nutcracker is at one end, where the two metal rods of the device are hinged together. The effort force is applied at the opposite ends of the rods, and the resistance force, the nut to be cracked open, lies in the middle.read more >>+119962023-04-22 00:05:08
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