During the swing of a frictionless pendulum, what energy form(s) remain constant?

Question

Quizplus · Accepted Answer

During the swing of a frictionless pendulum, the total mechanical energy, which is the sum of kinetic energy and potential energy, remains constant. This is because there is no external work done on the system, and thus, energy is conserved. While the kinetic energy and potential energy may change during the swing, the sum of the two remains constant. Therefore, choice D, kinetic plus potential energy, is the correct answer.

During the Swing of a Frictionless Pendulum, What Energy Form(s)