What is kinetic energy?

• A. Energy of motion
• B. Stored energy
• C. Thermal energy
• D. Energy due to position

Answer: (A)

Kinetic energy is the energy an object has because it is moving. It depends on how heavy the object is and how fast it’s going, with faster motion boosting the energy more (the energy increases with the square of speed). The standard expression is KE = 1/2 m v^2, where m is mass and v is velocity. This makes “energy of motion” the best description.

Stored energy refers to energy waiting to be released (like potential energy), energy due to position is a form of potential energy, and thermal energy relates to the random microscopic motion inside a substance. A moving vehicle has kinetic energy, which is why, in rescue scenarios, controlling motion and deceleration is crucial.