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OpenStudy (anonymous):
a falling stone takes 0.30 s to travel past a window 2.2 m tall. (a) From what height above the top of the window did the stone fall? (b) This was a second-floor window, and the stone was dropped from the roof. How many floors tall is the building? (c) Assuming up is the positive direction, what are the signs of the stone's velocity and the window? Explain why these signs make sense.
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