Explore motion, energy, roller coasters, potential energy, and kinetic energy with this STEM project for Grades 6–9. This design challenge investigates how energy is transferred and transformed in motion and how roller coasters use physics principles through a hands-on, NGSS-aligned PBL activity.Students will design and test roller coaster models, analyze how height and speed affect energy, interpret formulas such as Speed = Distance ÷ Time and p = m × v, and use test data to understand how ener