During the swing of a frictionless pendulum, what energy form(s) remain constant?
A) kinetic energy only
B) potential energy only
C) both kinetic energy and potential energy
D) kinetic plus potential energy
E) None of these choices are correct.

Question

Quizplus · Accepted Answer

During the swing of a frictionless pendulum, the total mechanical energy remains constant. This means that the sum of kinetic energy (energy of motion) and potential energy (energy of position) remains constant throughout the swing, as long as there is no external work being done on the system. Therefore, choice D (kinetic plus potential energy) is the correct answer.

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