---
title: "Weight — AP Physics 1 Definition & Exam Guide"
description: "Weight is the gravitational force on an object, Fg = mg. Learn how it differs from mass and how it shows up in free-body diagrams across AP Physics 1."
canonical: "https://fiveable.me/ap-physics-1-revised/key-terms/weight"
type: "key-term"
subject: "AP Physics 1"
---

# Weight — AP Physics 1 Definition & Exam Guide

## Definition

Weight refers to the gravitational force acting on an object. It is the measure of how heavy an object is and depends on both the mass of the object and the acceleration due to gravity.

## Related Study Guides

- [Unit 2 Overview: Dynamics](/ap-physics-1-revised/unit-2/review/study-guide/5wCs7oRuTfU4f61DUik4)

## Review

### Related Terms

- [Mass](/ap-physics-1-revised/key-terms/mass): The amount of matter in an object, which remains constant regardless of location.
- [Normal Force](/ap-physics-1-revised/key-terms/normal-force): The support force exerted by a surface that prevents an object from falling through it.
- Frictional Force: A resistive force that opposes motion when two surfaces are in contact with each other.