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19 December, 08:55

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65m/s off a cliff. Assume no air resistance. How long until the ball reaches the ground?

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  1. 19 December, 11:29
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    The horizontal motion has no effect on the vertical drop.

    From a drop, the distance the ball falls in 'T' seconds is

    D = 4.9 T^2

    so

    2.2 = 4.9 T^2

    T^2 = 2.2/4.9

    T^2 = 0.449 sec^2

    T = 0.67 second
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