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Easy torque question?

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2. An 800 N man stands halfway up a 5.0 m uniform ladder of negligible weight. The base of the ladder is 3.0 m from the wall. Assuming that there is no friction between the ladder and the wall, what is the magnitude of the force that the wall applies to the ladder?

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  1. Taking moments about the foot of the ladder:

    500 * 3 / 2 = 4R

    R = 187.5 N.

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