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9 March, 12:44

The boy on the tower of height h = 16 m in the figure below throws a ball a distance of x = 64 m, as shown. At what speed, in m/s, is the ball thrown?

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  1. 9 March, 13:01
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    So if the time to hit the ground is

    y=1/2*g*t^2 (projectile formula)

    then

    t=sqrt (2*y/g) = sqrt (2*16/9.8) = 3.26s

    so then

    64m/3.26s = 19.63m/s
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