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A balloon carrying a basket is descending at a constant velocity of 20.0 m/s. A man in the basket throws a stone with an initial velocity of 15.0 m/s horizontally perpendicular to the path of the descending balloon, and 4.00 second later this person sees the rock strike the ground.
1) Find how high was the balloon when the rock was thrown out?
2) Find how far horizontally does the rock travel before it hits the ground?
3) At the instant the rock hits the ground; find how far is it from the basket?
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