---
title: "Linear Acceleration — AP Physics C Mechanics Definition"
description: "Linear acceleration is the rate of change of velocity (a = dv/dt). In AP Physics C Mechanics, it links to angular acceleration through a = αr in rotation problems."
canonical: "https://fiveable.me/ap-physics-c-mechanics/key-terms/linear-acceleration"
type: "key-term"
subject: "AP Physics C: Mechanics"
---

# Linear Acceleration — AP Physics C Mechanics Definition

## Definition

Linear acceleration refers to the rate at which an object's velocity changes over time in a straight line. It measures how quickly an object speeds up or slows down.

## Related Study Guides

- [5.2 Rotational Kinematics](/ap-physics-c-mechanics/unit-5/rotational-kinematics/study-guide/Gsw0lqWOAjobUHG86ljB)

## Review

### Related Terms

- [Velocity](/ap-physics-c-mechanics/key-terms/velocity): Velocity is the speed of an object in a given direction.
- [Acceleration](/ap-physics-c-mechanics/key-terms/acceleration): Acceleration is the rate at which an object's velocity changes, including both linear and angular acceleration.
- Deceleration: Deceleration is negative linear acceleration, representing slowing down or decreasing speed.