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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?

Text Solution

Verified by Experts

The correct Answer is:
A, B
(a) `h=15+u^2/(2g)`
`=15+(5)^2/(2xx10)`
`=16.25m`
(b) `t=sqrt((2h)/g)=sqrt((2xx16.25)/10)=1.8s`
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