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Double Pivots Question

Writer's picture: Evan TohEvan Toh

A man is standing on a uniform plank of mass 20 kg and 6 m long. He is standing 1 m from the string at A.


a) Find the unknown forces FA and FB. (Ans: Fa = 550 N and FB = 250 N)



The man now walks to the left of A.


b) Determine the maximum distance in which the man can move before the plank topples. (Ans: d = 0.67 m)



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