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December 19, 2014

Homework Help: Calculus

Posted by chamy on Sunday, April 8, 2012 at 9:08am.

The seesaw principle: As you probably know, any two persons can balance each other
when sitting on opposite sides of a seesaw, regardless of their weights. It is only necessary
that each person contribute the same moment — calculated by multiplying the person’s
weight times the distance to the fulcrum. For example, if an 80-
pound child sits at one end of a 20-foot plank, 10 feet from the
fulcrum, a 200-pound adult can balance this system. Tell how.

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