Which of the following statements is/are true? Check all that apply. Check all that apply. The total mechanical energy of a system is constant only if all the forces doing work on it are nonconservative. The total mechanical energy of a system is constant only if all the forces doing work on it are conservative. The total mechanical energy of a system is equally divided between kinetic and potential energy. Mechanical energy can be dissipated to nonmechanical forms of energy. The total mechanical energy of a system, at any one instant, is either all kinetic or all potential energy.
