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22 June, 13:17

A rocket is launched from ground level with an initial vertical velocity (v0) of 176 ft/s. After how many seconds will the rocket hit the ground? (Hint: h (t) = - 16t2 + v0t + h0).

explain.

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  1. 22 June, 13:23
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    We know that v0 is 176 ft/s and h0 is 0 because the rocket is at ground level before launch.

    h (t) will also equal 0 when the ground hits the ground. We substitute these values:

    0 = - 16t² + 176t

    Solving the equation,

    t = 0; t = 11 seconds

    The rocket starts from the ground, t = 0, and comes back to the ground at t = 11 seconds.
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