mass
Resources
PhET: Density
Why do some materials like wood float in water, and others don’t? Interact with blocks of different materials, including a custom option by modifying their mass and volume, to explore the effect on the density and discover the conditions for sinking or floating in water. Play detective to determine the material of each block by comparing its density with the values in the table.
PhET: Gravity Force Lab: Basics
Visualize the gravitational force that two objects exert on each other. Discover the factors that affect gravitational attraction, and determine how adjusting these factors will change the gravitational force.
PhET: Buoyancy: Basics
When will objects float, and when will they sink? Learn how buoyancy works by experimenting with different blocks, modifying their volume and mass, and placing them in the pool with fluids of different densities. Analyze the forces generated when the block is inside the pool, and identify the variables that affect the buoyant force.