How to Calculate Maximum Jump Height with Given Variables

[FrenchAtticus]

Homework Statement

A 73 kg high jumper leaves the ground with a vertical velocity of 7.6 m/s.
How high can he jump? The acceleration of gravity is 9.8 m/s^2.

Homework Equations

mgh1 + 1/2mv1^2 = mgh2 + 1/2mv2^2

The Attempt at a Solution

0 + 1/2(7.6)^2 = 9.8(h2) + 1/2(v2)^2

How can you solve this when you two unknowns?
Does v1 = 7.6 also apply to v2?
Am I using the right equation?

 

[natives]

Correct equation...Concept:when the jumper has jumped his highest at that point "instantaneously" his velocity becomes zero..So set v2=0 and head on with the math.

 

[FrenchAtticus]

Alright thank you, that helps a ton.