Student exploration of mechanisms includes investigations of how mechanisms change energy by transferring direction, speed, type of movement, and force. Students discover a variety of ways potential energy can be stored and released as kinetic energy. Citing evidence, students explain the relationship between the speed of an object and the energy of that object. They also predict the transfer of energy as a result of a collision between two objects. As students solve the problem for this module, they apply their knowledge and skills related to energy transfer in collisions to develop a vehicle restraint system.