physics
posted by Ed .
A football kicker lines up to kick a game winning kick. The goalpost is 30m away and the ball must clear the 3.3m high crossbar. If the kick leaves his foot at an angle of 35 degrees, how fast must the kick be to clear the bar?

Vo^2*sin(2A)/g = Dx = 30 m.
Vo^2*sin(70) / 9.8 = 30,
Vo^2*0.095887 = 30,
Vo^2 = 30 / 0.095887 = 312.9,
Vo = 17.69 m/s.