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April releases a rock at rest from the top of a 40 m tower. Ignoring air resistance, what is the speed of the rock as it hits the ground? ( g = 9.8 m/s/s)

  • physics - ,

    Calculate how long it take to hit the ground, by rearranging the equation
    Y = (1/2) g t^2
    which should be in your course/text materials.

    Let Y be the 40 m distance that it falls. Solve for t.

    on ce you have t, get the velocity from
    V = gt

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