Kinetic energy

Definition

Kinetic energy is the energy possessed by an object due to its motion. It depends on the mass and velocity of the object.

5 Must Know Facts For Your Next Test

1. Kinetic energy is given by the formula $KE = \frac{1}{2}mv^2$, where $m$ is mass and $v$ is velocity.
2. Kinetic energy is a scalar quantity and has units of Joules (J).
3. The work-energy theorem states that the work done on an object is equal to its change in kinetic energy.
4. When velocity doubles, kinetic energy increases by a factor of four.
5. Kinetic energy can be converted into other forms of energy, such as potential energy.

Review Questions

• What is the formula for calculating kinetic energy?
• How does doubling an object's velocity affect its kinetic energy?
• Explain the work-energy theorem in relation to kinetic energy.

Related terms

Potential Energy: The stored energy in an object due to its position or configuration.

Work: The process of transferring energy to an object by applying a force over a distance.

Conservation of Energy: A principle stating that the total energy in a closed system remains constant over time.