1. The problem statement, all variables and given/known data I have a table that needs to be filled out. In each column, potential and kinetic energy are given, but height and velocity are left blank. Ex: PE = 20 J, KE = 0 J, h = ?, V = ? 2. Relevant equations KE = 1/2mv^2 U = mgh 3. The attempt at a solution I'm totally stumped. How can I figure out either of these with no mass given?