Charlie Brown kicks a ball at v0 = 22.5 m/s at α = 33.0 degrees. How far has the ball moved horizontally when it reaches its highest point?
I decompose v0 into the vertical and horizontal component.
vh=v0×cosα=22.5ms×cos 33°=18.87ms
vv=v0×sin α=22.5ms×sin 33°=12.2544 ms
The vertical component vy is zero at the highest point.
v0×sin α−g×t=0
t=v0×sin αg =22.5ms×sin 33°9.81ms2
t=1.249 s
The ball has reached the highest point
of the throwing parcel after 1.249s.
w=vh×t=18.87 ms×1.249 s
w=23.569 m
The ball has a horizontal distance of 23.569 m
when it is at the highest point
of the throwing parabola.
!
.