A particle is in simple harmonic motion along the x axis. The amplitude of the motion is x_m. At one point in its motion its kinetic energy is K = 5J and its potential energy (measured with U = 0 at x = 0) is U = 3J. When it is at x = x_m, the kinetic and potential energies are: A) K = 5J and U = 3J B) K = 5J and U = -3J C) K = 8J and U = 0 D) K = 0 and U = 8J E) K = 0 and U = -8J

Question

Quizplus · Accepted Answer

At the amplitude (x = x_m), the particle is momentarily at rest, so its kinetic energy K = 0, and all the energy is potential, U = total energy = 8J (since K + U = 5J + 3J = 8J).

A Particle Is in Simple Harmonic Motion Along the X