Title: two blocks and a spring
Category: Vertical Oscillations
Summary: It is a problem to help people understand if there are two objects hang with each other and hang on the spring what will happen.
https://blogs.ubc.ca/phys101/files/gravity_forms/1-72f8f8fec225ededbd95c074100f3d9f/2015/01/IMG_3416.JPG