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A football is kicked vertically upward f...

A football is kicked vertically upward from the ground and a student gazing out of the window sees it moving upwards past her at `5.00 m//s.` The window is `15.0 m` above the ground. Air resistance may be ignored. Take `g=10 m//s^2.`
(a) How high does the football go above ground?
(b) How much time does it take to go from the ground to its highest point?

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