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23 September, 06:06

To make extra money during the summer, mr. garber, a 660-n physics teacher, paints the outside of houses while sitting on a 40.-n plank suspended by two vertical cables. what is the tension in each of the two cables?

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  1. 23 September, 06:15
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    The weight of Mr. Gerber and the plank is

    660 + 40 = 700 N

    To remain in equilibrium, the total weight should act at the center of mass of the plank, as shown in the figure.

    Assume that the mass of the plank is uniformly distributed along its length.

    The tension in each cable is T, therefore

    2T = 700

    T = 350 N

    Answer: 350 N
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