• Kinetic energy is the energy due to motion.
  • Potential energy is energy stored in matter and released during a chemical reaction.
  • The joule (J) is the SI unit of energy and equals kg • m2/s2.
  • The calorie (cal), which is equivalent to 4.184 J, is the most common unit used to measure energy in the UK.
  • It is the same SI unit as the kilogram, which is equal to 1,000,000 J.
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