A football is kicked at ground level with a speed of 17.9m/s at an angle of 39.0∘ to the horizontal. How much later does it hit the ground?
Physics - Henry, Friday, February 7, 2014 at 4:52pm
Vo = 17.9m/s[39o]
Xo = 17.9*cos39 = 13.91 m/s.
Yo = 17.9*sin39 = 11.26 m/s.
Y = Yo + g*Tr = 0 @ max ht.
11.26 - 9.8Tr = 0
9.8Tr = 11.26
Tr = 1.15 s. = Rise time.
Tf = Tr = 1.15 s. = Fall time.
Tr+Tf = 1.15 + 1.15 = 2.30 s. = Time to
Physics - Morgan, Wednesday, February 12, 2014 at 11:02pm