An elastic collision is one in which:
Understand the Problem
The question is asking to identify the defining characteristic of an elastic collision from the given options. An elastic collision is a type of collision where the total kinetic energy of the system remains constant before and after the collision.
Answer
An elastic collision is one in which there is no net loss of kinetic energy.
An elastic collision is one in which there is no net loss of kinetic energy. This means that the total kinetic energy of the system before the collision is equal to the total kinetic energy after the collision.
Answer for screen readers
An elastic collision is one in which there is no net loss of kinetic energy. This means that the total kinetic energy of the system before the collision is equal to the total kinetic energy after the collision.
More Information
In ideal elastic collisions, both momentum and kinetic energy are conserved. Real-world collisions are never perfectly elastic, but some collisions, like those between billiard balls, are very close to elastic.
Tips
A common mistake is to think that all collisions conserve kinetic energy. In inelastic collisions, kinetic energy is not conserved, but momentum is always conserved in a closed system.
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