A box with a m=2.5kg is at rest at the top of the ramp (H=5.0m). What is PEg of the box? g=9.8m/s

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system