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**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

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?

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?