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28 December, 23:00

7. Nancy has a mass of 60 kg and sits on the very end of a 3.00 m long plank pivoted in the middle. How much torque must her co-worker provide on the other end of the plank in order to keep Nancy from falling on the ground?

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  1. 28 December, 23:13
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    Torque = 882Nm

    Explanation:

    Torque = Mg*distance

    But plank's is pivoted, therefore distance=3/2=1.5m

    Mass of Nancy=60jg

    Acceleration due to gravity, g=9.8m/s^2

    Torque = 60*9.8*1.5

    Torque = 882Nm
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