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Q. A baseball is seen to pass upward by a window 22m above the street with a vertical speed of 11m/s .

If the ball was thrown from the street, what was its initial speed?

Q. A 3000 kg freight train traveling at a rate of 2 m/s strikes a stationery 3000 kg freight car and couples up. What is the speed of the 2 cars as they move together after the collision?

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Category:- Physics
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