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April 19, 2014

Homework Help: calculus

Posted by Equihua on Friday, January 4, 2013 at 2:21pm.

A piece of elastic is attached to two nails on a flat board, with a button attached to the midpoint of the elastic. The ails are 5 cm apart. You stretch the elastic by pulling the button along the board i the direction that is perpendicular to the line between the nails.
A. Find the equation that relates the total length of the elastic x to the distance y that the button has moved.
B. You pull down the button at a constant 3cm/sec. Find the rate at which the length of the elastic is increasing when it is 12cm long.

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