A long uniform board weighs 51.4 N (10.3 lbs) rests on asupport at its mid point

Question

A long uniform board weighs 51.4 N (10.3 lbs) rests on asupport at its mid point. Two children weighing 491.0 N (98.2 lbs)and 257.0 N (51.4 lbs) stand on the board so that the board isbalanced. What is the upward force exerted on the board by thesupport? Can I get a numerical answer? A long uniform board weighs 51.4 N (10.3 lbs) rests on asupport at its mid point. Two children weighing 491.0 N (98.2 lbs)and 257.0 N (51.4 lbs) stand on the board so that the board isbalanced. What is the upward force exerted on the board by thesupport? Can I get a numerical answer?

Explanation / Answer

net force in vertical direction = 0 N - 51.4 - 491.0 - 257.0 = 0 the upward force N = 799.4 N

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