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22 April, 21:54

A student drops a ball from the top of a 10-meter tall building. The ball leaves the thrower's hand with a zero speed. What is the speed of the ball at the moment just before it hits the ground?

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  1. 22 April, 22:06
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    14 m/s

    Explanation:

    u = 0, h = 10 m, g = 9.8 m/s^2

    Use third equation of motion

    v^2 = u^2 + 2 g h

    Here, v be the velocity of ball as it just strikes with the ground

    v^2 = 0 + 2 x 9.8 x 10

    v^2 = 196

    v = 14 m/s
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