A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?
A) one-fourth of the way between A and B
B) midway between A or B
C) at either A or B

Question

Quizplus · Accepted Answer

The kinetic energy of a mass attached to a spring is minimum (actually zero) at the points of maximum displacement (A or B), where the velocity of the mass is zero. At these points, all the energy is stored as potential energy in the spring.

A Mass Is Attached to a Vertical Spring and Bobs