Question

Bob drops a ball from rest out the window of a building. At the very same instant Phyllis releases a ball upward with an initial speed of 11.0 m/s from a point 20.0 m directly below Bob.

(a) At what height above Phyllis do the balls collide?

(b) Is the ball thrown by Phyllis moving upward or downward when
the collision occurs? Explain

Answer #1

Note: In the figure, the distance between A and C is 20 m not 11 m.

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