Question

A light is at the top of a pole 80 feet high. A ball is dropped at the same
height from a point 20 feet away from the light. A wall 80 feet high, 60 feet
away from the light is built. Assuming the ball falls according to the
Newtonian Law 2 s=16(t^2) where s is the distance in feet and t is the time in
seconds, find:
a) how fast the shadow of the ball is moving on the wall after 1 second.
b) how fast the shadow is moving along the ground after 2 seconds.
a. -100

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