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Q.

You drop a ball from a window located on an upper floor of a building. It strikes the ground with speed v. You now repeat the drop, but your friend down on the ground throws another ball upward at the same speed v, releasing her ball at the same moment that you drop yours from the window. At some location, the balls pass each other. This location is

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a

cannot be determined

b

above the point in option 1

c

below the point in option 1

d

at the halfway point between window and ground.

answer is B.

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Detailed Solution

The ball has zero initial speed and smaller average speed during the time of flight to the passing point. So the ball must travel a smaller distance to the passing point than the ball your friend throws.

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