A man is walking on a plank which is placed horizontally across two supports so that equal length projects at each end. If the plank is 5m long and has a mass of 30kg, what is the greatest distance from each end at which the support can be placed so that a man of mass 80kg can stand anywhere on the plank without it falling off the supports?
"80x=30(0.5(5)-x)"
"x=0.68\\ m"
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Nice work
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