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August 21, 2014

Homework Help: physics

Posted by melissa on Wednesday, November 17, 2010 at 10:18pm.

I know this has been posted many times but I keep trying and cannot get the right answer, A place kicker must kick a football from a point 39.9 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ground with a speed of 20.6 m/s at an angle of 53 to the horizontal. By how much does the ball clear or fall short of clearing the crossbar?
I got that the time was 3.35 and because v=d/t I got 11.91 and then made a triangle of 20.6 aas the hyp and 11.91 at the bottom so then i got 16.81 which crosses the bar by 13.75 but thats not the right answer, PLEASE HELP

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