A football is kicked at ground level with a speed of 17.7 m/s at an angle of 39.8 ∘ to the horizontal.

How much later does it hit the ground?

Answer=> t=_____ s

Express your answer using three significant figures and include the appropriate units.

1 answer

Vo = 17.7 m/s[39.8o].
Yo = 17.7*sin(39.8) = 11.33 m/s. = Vert. component of Vo.

Y = Yo + g*Tr = 0.
11.33 - 9.8Tr = 0, Tr = 1.16 s. = Rise time.

T = Tr+Tf. Tf = Tr.
T = Tr+Tr = 1.16 + 1.16 = 2.32 s.