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22-09-2017
Physics

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Hi! Can you help me? A rock is dropped off a tall building and takes 4 seconds to hit the ground. How fast was it going? Using your last answer, how tall was the building? Thanks! :)

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amiramalik808 amiramalik808

22-09-2017

Free fall distance h=78.4532 m
Free fall velocity v=39.2266 m/s
= 141.21576 km/h

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