Students measure motion and learn about speed and acceleration. Through explorations, they learn about force and “discover” Newton’s three laws of motion and how they relate to sports. They also investigate acceleration due to gravity as well as physical and mathematical models of projectile motion. They explore friction, calculate the coefficient of friction, and consider the effect of friction in sports. Then they learn about gravitational potential energy, kinetic energy, spring potential energy, the law of conservation of energy, and how energy and work are related.