This is a fun and challenging lab that you can use to teach your students about speed, gravity, potential energy, kinetic energy, mass, and momentum! The materials required are fairly simple, and your students will, without a doubt, have their thinking caps on while completing this! This lab takes my students a solid hour including introducing the lab, etc., so it is a Great lab to use for collecting data and following the steps of the scientific method. As with all labs and lessons, try this