---
title: "Elastic Collision — AP Physics 1 Definition & Exam Guide"
description: "An elastic collision conserves both momentum and kinetic energy. Learn how AP Physics 1 tests it in Topic 5.4 and how to tell it apart from inelastic collisions."
canonical: "https://fiveable.me/ap-physics-1-revised/key-terms/elastic-collision"
type: "key-term"
subject: "AP Physics 1"
---

# Elastic Collision — AP Physics 1 Definition & Exam Guide

## Definition

An elastic collision is a type of collision where kinetic energy is conserved. In this type of collision, the objects bounce off each other without any deformation.

## Related Study Guides

- [5.4 Conservation of Linear Momentum](/ap-physics-1-revised/unit-5/conservation-linear-momentum/study-guide/k0LqYNTiudaqRa9GvvhL)

## Review

### Related Terms

- [Inelastic Collision](/ap-physics-1-revised/key-terms/inelastic-collision): A type of collision where kinetic energy is not conserved. The objects stick together or deform upon impact.
- Coefficient of Restitution: A value between 0 and 1 that represents how bouncy an object or surface is during a collision.
- Impulse-Momentum Theorem: Relates the change in momentum to the force applied to an object over a given time interval.