What two forms of energy are described as kinetic energy and the stored energy called?

• A. Thermal energy
• B. Kinetic energy and potential energy
• C. Electrical energy
• D. Chemical energy

Answer: (B)

Energy comes in different forms, and two key ones when talking about motion and position are kinetic energy and potential energy. Kinetic energy is the energy of motion—the faster something moves or the more massive it is, the more kinetic energy it has. Potential energy is stored energy due to position or configuration—like how high an object is in a gravitational field or how stretched a spring is. This stored energy can be converted into motion, so energy can continually transfer between kinetic and potential forms while the total energy stays the same (ignoring friction).

Other options refer to different categories of energy. Thermal energy relates to microscopic motion of particles, electrical energy comes from electric charges, and chemical energy is stored in chemical bonds. The pair described by the question is the combination of motion-based energy and stored energy due to position.