In physics, which form of energy is associated with motion?

• A. Kinetic energy
• B. Potential energy
• C. Thermal energy
• D. Chemical energy

Answer: (A)

Motion is tied to kinetic energy, the energy of motion. It depends on both how massive something is and how fast it’s moving, given by KE = 1/2 m v^2. That means a heavier object or a faster one carries more energy while moving. If an object is at rest, its kinetic energy is zero, and as it speeds up, its kinetic energy increases quickly because of the square of velocity. This energy can be transferred or transformed when motion interacts with forces—friction may turn kinetic energy into heat, for example. Other energy types don’t describe motion itself: potential energy comes from position or configuration (like height or spring stretch), thermal energy relates to microscopic motion and temperature, and chemical energy is stored in bonds and released in reactions.