displacement

phet.colorado.edu

When will objects float, and when will they sink? Learn how buoyancy works and the forces involved by experimenting with objects, like blocks, materials with different shapes, a bottle with substances inside, and blocks in a boat, in a pool with a fluid that can be modified.

phet.colorado.edu

Stretch and compress springs to explore the relationships between force, spring constant, displacement, and potential energy! Investigate what happens when two springs are connected in series and parallel.