Homework Help: Conservation of energy problem

1. a student throws a ball down with an initial velocity of 5.0 m/s from a point 8.0 m above the base of a track. Find the speed of the ball as it hits the base of the track. The track is designed to losslessly change the direction of the ball up a frictionless ramp. What is the height above the ground reached by the ball



2. K = 1/2 mv^2
U = mgh
E1 = E2



3. If I knew the mass of the ball this problem would be easy
U = mgh
K= 1/2 mv^2
mgh(initial) + 1/2mv^2(initial) = mgh(final)
I dont have the mass
is there an equation that I can sub into the above to isolate the mass or is mass irrelevant as it is on both sides of the equation?
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution