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Old Dec 18th 2017, 04:40 PM   #1
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Equilibrium Problem

A uniform plank of mass 22kg and length 12m rests horizontally on two supports S1 and S2. Support S2 is 3.2m from the right end of the plank. Whatís the furthest distance from S2 that a 53kg box can be placed without the plank tipping over?

I set up my equations to sum the forces in the Y direction and sum the moments about one point, but I have two equations and three unknowns. Do I need to set up another moment equation?
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Old Dec 19th 2017, 08:20 AM   #2
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Please show us the two equations you have so far.
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