Bill is playing soccer and kicks the ball from ground level with an initial speed of 20 m/s in a direction of 30 degrees above the horizon. g=10m/s^2.. What is the magnitude and direction of the velocity vector when the ball hits the ground
vfh = vih * cos 30 = (20 sqrt of 3) /2
vfv=vi *sin 30=10
vf=sqrt (vfh^2 +vfv^2)=20m/s
magnitude tan^-1(vfv/vfh)=30 degree
That does not match the choices that I have. Choices are
a) mag 15.6 dir 50
b) mag 10 dir 180
c) mag 15.6 dir 130
d) mag 10 dir 0
Sorry disreguard my post. That was for a different question
ok, no problem
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