Explore the rules that connect motion, energy, matter, and the universe.
Explore physics through motion, forces, energy, waves, electricity, and modern physics.
Motion describes changes in position over time.
Learn MoreA force is a push or pull that can change motion.
Learn MoreEnergy can be transferred or transformed but is conserved in a closed system.
Learn MoreWaves carry energy through matter or space.
Learn MoreElectric charges create electric fields, and moving charges produce magnetic fields.
Learn MoreRelativity describes space, time, gravity, and very high speeds.
Learn MoreMotion describes changes in position over time. Speed tells how fast something moves, while velocity includes direction and acceleration measures how velocity changes.
A force is a push or pull that can change motion. Newton's laws connect force, mass, and acceleration and explain interactions from falling objects to orbiting spacecraft.
Energy can be transferred or transformed but is conserved in a closed system. Kinetic, gravitational, chemical, thermal, and electrical energy are useful ways to track change.
Waves carry energy through matter or space. Sound needs a medium, while electromagnetic waves—including light, radio, and X-rays—can travel through a vacuum.
Electric charges create electric fields, and moving charges produce magnetic fields. Their connection powers motors, generators, electronics, and communication systems.
Relativity describes space, time, gravity, and very high speeds. Quantum physics explains matter and energy at atomic scales where probabilities replace everyday certainty.