Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
The law of conservation of momentum states that in any isolated system, the total momentum before an event (such as a collision) is equal to the total momentum after that event, provided no external forces act on it.
An elastic collision is a type of collision where kinetic energy is conserved before and after impact. Objects bounce off each other without any loss in energy.
An inelastic collision is a type of collision where kinetic energy is not conserved before and after impact. Some energy is lost, usually in the form of heat or deformation.