Kinetic energy

Science

Definition

The energy an object possesses due to its motion. It depends on both the mass and the square of the velocity, meaning doubling the speed quadruples the kinetic energy. Kinetic energy is always positive and is measured in joules.

Examples

  • A moving bowling ball knocking down pins
  • Wind turning turbine blades to generate electricity
  • A sprinter having more kinetic energy at full speed than while jogging
Key Fact

KE = ½mv²

Related Terms

Potential energy Work-energy theorem Conservation of energy Work

Study This Concept

Practice kinetic energy with free review games in these units:

AP Physics 1 Unit 3: Work Energy and Power Physics Unit 3: Work and Energy