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View Thread: What colour is the bear
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    zhuo

    Ping wrote:
    A bear dropped into a hole from v=0 m/s at start, 2 seconds later, it landed on the bottom, the hole is 20 m, if the air resistant does not count, what colour is the bear? (useful formula S=Ut+½at²)


    probably black, since the hole is 20m deep.