Kinematics Equation: Finding Velocity with Mass, Potential Energy, and Gravity

[DonovanX]

velocity^2= 2*g*height

Could somebody help me with the correct answer. I know the
mass = 75 kg
gravitational potential energy = 2.8kj
gravity = 9.8 m s ^-2
What would the answer be?

 

[Doc Al]

What exactly is the problem you are trying to solve?