The discussion revolves around a problem involving a box sliding down a frictionless inclined plane, focusing on the concepts of mechanical energy, specifically kinetic and potential energy. The original poster seeks assistance with understanding the relevant formulas and calculations related to the scenario.
Participants are actively engaging with the problem, offering guidance on the relationship between potential and kinetic energy. There is a focus on ensuring that calculations are performed correctly, particularly regarding units and the setup of equations.
There is an emphasis on the initial conditions of the problem, such as the box starting from rest and the absence of friction. The participants are also considering the implications of these conditions on the energy calculations.
That looks like a calculation of the PE at the top of the ramp: PE = mgh. (The units will be Joules.) Which happens to be the total mechanical energy, since it starts from rest. Since energy is conserved, this also equals the KE at the bottom of the ramp. ([itex]{KE} = 1/2 m v^2[/itex])billyghost said:19 x 1.3 x 9.8 ?