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23. Tarzan tries to cross a river by swinging from one bank to the other on a vine that is
10.0m long. His speed at the bottom of the swing, just as he clears the surface of the
river, is 8.0m/s. Tarzan does not know that the vine has a breaking strength of 1.0 x
10 N. What is the largest mass Tarzan can have and make it safely across the river?

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