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    uchi17 Posts: 1, Reputation: 1
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    #1

    Sep 15, 2008, 06:49 PM
    what equation do i use and i do i solve it
    I don't know what equation I am supposed to use for this problem:

    A stone is thrown horizontally with an initial speed of 30m/s from a bridge. Find the stone's total speed ( in meters per second) when it enters the water 4 seconds later.

    please answer me :confused:

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