A ball vibrates back and forth from the free end of an ideal spring having a force constant (spring constant) of 20 N/m. If the amplitude of this motion is 0.30 m, what is the kinetic energy of the ball
When it is 0.30 m from its equilibrium position?
A) 0.00 J
B) 1.4 J
C) 0.45 J
D) 0.90 J
E) 0.22 J

Question

Quizplus · Accepted Answer

At 0.30 m from its equilibrium position, the ball is at its maximum displacement (amplitude), meaning all its energy is potential and its kinetic energy is 0.00 J because it momentarily stops before changing direction.

A Ball Vibrates Back and Forth from the Free End