Question

A football is kicked off the flat ground at 23.0m/s at an angle of 30 degrees relative to the ground.
Determine the total time it is in the air.

Answer 1

A football is kicked off the flat ground at 23.0m/s at an angle of 30degrees relative to the ground.
Determine the total time it is in the air.
sin(30)=v_vert/23
30sin(23)=v_vert
v_vert=11.5
v=u+at
0=11.5=(-9.8)xt
9.8(t)=11.5
t=11.5/9.8=1.173

Just copied and pasted that from Yahoo Answers, The answer goes more indepth...Refer here and make sure to check if its right:

http://answers.yahoo.com/question/index?qid=20110929214236AAK6PZ7