This is a PBL project that used the North Carolina Gravity Games as the basis for students to understand the concepts of work and energy. It was specifically designed to help students increase their depth of knowledge of work, the conservation of energy, power, and the work-kinetic energy theorem. The project required students to design, build, and then use as a basis to prove their applied mastery of work and energy, a working "gravity car" that was tested locally, with the top three entering in the state-wide Gravity Games competition in Lenoir, NC. Note that the project was designed and delivered per the North Carolina honors Physics curriculum and it can be customized to meet your own specific curriculum needs and resources.