How Is Energy Dissipated by Friction Calculated in Physics Problems?

[MissKaylaPaige]

Homework Statement

Find the amount of energy E dissipated by friction by the time the block stops.
Express your answer in terms of some or all the variables m, v, and h and any appropriate constants.

Homework Equations

sqrt(v^2 + 2gh)

The Attempt at a Solution

I know it involves the equation for the law of conservation of energy, and the above equation, but the other constants I have not figured out.

 

[catkin]

The question is incomplete. Essential information is missing