A soccer ball is kicked from the ground with initial speed 17 m/s at angle 20 0

find
a) The horizontal distance that the ball travels after 4 s ?
b) The speed of the ball at the highest point ?

1 answer

at the highest point, it has only horizonal speed, 17cosine20

distance:
time in air is found by
hf=hi+vi'(t)-4.8t^2
or t=vi'/4.8=17sin20/4.8

distance=17cos20*17*sin20/4.8