physics problem from rose
A quaterback throws a football to a stationary receiver who is 31.5 m down the field. If the football is thrown at an initial angle of 40 degrees to the ground, atwhat initial speed must the quarterback throw the ball for it to reach the receiver? What is the ball's highest point during its flight?
Homework Answers
let velocity is V
therofore
Vx = Vcos(40)
Vy = Vsin(40)
use Vy to find time of flight
s = ut + .5 at^2
here s=0 , u=Vy , a= -g
so u get t
in terms of V
now 31.5 = Vx * t
solve for V (answer)
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