- #1

edgarpokemon

- 93

- 1

## Homework Statement

http://tinypic.com/r/10f5ni8/9

http://[PLAIN]http://i66.tinypic.com/10f5ni8.png

## Homework Equations

I have a problem understanding this problem. It asks for the velocity of block A when block B is moved 300mm/s to the right. The equation for the cord length is given as 2xb-3xa=constant.

## The Attempt at a Solution

I don't understand the equation at all. wouldn't the total cord of the length be xb + (xb-xa) +2xa= constant? help! i understand how to get velocities and all the problems similar to this one, but expect this one :(

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