- #1
vande060
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A golfer drives a ball with initial angle
θ = 45 from a tee at the origin. The ball
hits a window at height h = 10m a distance
D = 80m away.
a. Find the initial launch speed v0 of the ball.
b. Suppose a second golfer tees off from the
same spot at an unknown angle and speed,
and miraculously her shot also hits the window
at the same height 1.8 s after launch. With
what speed did it hit the window?
c. Was her ball ascending or descending or in level flight when it hit?
y(x) = tan*x -.5*g*(x^2/v0^2*cos^2)
part a was easy enough, i solved the above trajectory equation for v0 to get v0=30m/s, but after that i can't figure out how to solve part b and c. it seems everything i could solve for to get the velocity of impact requires knowing the initial angle and initial speed
θ = 45 from a tee at the origin. The ball
hits a window at height h = 10m a distance
D = 80m away.
a. Find the initial launch speed v0 of the ball.
b. Suppose a second golfer tees off from the
same spot at an unknown angle and speed,
and miraculously her shot also hits the window
at the same height 1.8 s after launch. With
what speed did it hit the window?
c. Was her ball ascending or descending or in level flight when it hit?
y(x) = tan*x -.5*g*(x^2/v0^2*cos^2)
part a was easy enough, i solved the above trajectory equation for v0 to get v0=30m/s, but after that i can't figure out how to solve part b and c. it seems everything i could solve for to get the velocity of impact requires knowing the initial angle and initial speed