Hi guys,

I'm stuck on this problem.

A ball is dropped from a height of 100 ft, at which time its shadow is 500 ft from the ball. How fast is the shadow moving when the ball hits the ground? The ball falls with velocity 32 ft/sec, and the shadow is cast by the sun.

The only thing I have so far is that the derivative of the height of the ball is -32. I have no idea where to go from there.