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19 May, 04:38

a projectile is fired from the ground with an upward speed of 245 m/s. after how many seconds will it return to the ground? use the formula h = vt - 4.9^2

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  1. 19 May, 08:10
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    WORK:

    Solving for t:

    245 - 4.9t = 0

    -4.9t = - 245

    t = - 245/-4.9

    t = 50 seconds
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