A weightless board is balanced on a knife edge. Two blocks, having weights of 14

Question

A weightless board is balanced on a knife edge. Two blocks, having weights of 140 ounces (oz.) and 70 oz. are set on the board as shown, each

A weightless board is balanced on a knife edge. Two blocks, having weights of 140 ounces (oz.) and 70 oz. are set on the board as shown, each 1/2 meter from the knife edge. A third block, having a weight of 10 oz, is set on the board. At what distance from the knife edge must the block be set in order to balance the board? Please show work and use attached graphics.

Explanation / Answer

140*0.5 = 70*0.5 + 10*x

==> x = (140*0.5-70*0.5)/10 = 3.5 m

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