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    Walking the Plank

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    A horizontal uniform bar of mass m and length L is hung horizontally on two vertical strings. String 1 is attached to the end of the bar and string 2 is attached a distance L/4 from the other end. A monkey of mass m/2 walks from one end of the bar to the other. Find T_1, the magnitude of the force of tension in string 1. Express your answer in terms of appropriate constants and any of the given variables.

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    Note 1. Let x be the distance along the plank from string #1 to the monkey.
    Note 2. Assume a reference axis at string #2. Distances from the axis are moment arms. Note ...

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