Convervation Laws

[soul5]

1. The problem statement, all variables and given/known data
In a tennis match, a player wins a point by hitting the ball sharply to the ground on the opponents side of the net. If the ball bounces upward from the ground with a speed of 16m/s and is caught by a fan with a speed of 12 m/s, how high above the court is the fan?


2. Relevant equations
Don't know.


3. The attempt at a solution
How do I start this question?

[cse63146]

Start with finding out if there is potential gravitational/spring/kinematic enegery at the beginning or at the end.

mgh_i + .5m(v_i)^2 + .5k(x_i)^2 = mgh_f + .5m(v_f)^2 + .5k(x_f)^2

[soul5]

k i'll do that