Introduction

AP® Physics

1. Basics

2. Kinematics

3. Forces & Newton's Laws

4. Torque & Rotational Dynamics

5. Centripetal Force & Orbits

6. Energy, Work & Power

7. Momentum & Collisions

8. Simple Harmonic Motion & Waves

Why does a boat float in water but a boat anchor sinks? What actually causes something to float?

The answer is the **buoyant force**. This is an upwards force that acts on any object submerged in a fluid. But there's nothing magical about
it - the buoyant force is just the net force caused by the fluid pressure, and since pressure increases with depth the net force is upwards.

While taking a bath, an ancient Greek physicist named Archimedes discovered that the upward buoyant force on a submerged object is equal to the
weight of the fluid that the object displaces (known as **Archimedes' principle**).

In this lesson we'll learn about the buoyant force, how it works and how to calculate it.

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**Answers**

1

- Crash Course - Fluids at Rest (5:55)
- Michel van Biezen - Buoyancy Force
- Michel van Biezen - Archimedes Principle: Density of an Object
- Matt Anderson - Will It Float? Archimedes Principle
- Matt Anderson - How Much of an Iceberg is Under Water?

- Organic Chemistry Tutor - Archimedes Principle, Buoyant Force
- Organic Chemistry Tutor - How to Calculate the Fractional Volume Submerged

Why does a boat float in water but a boat anchor sinks? What actually causes something to float?

The answer is the **buoyant force**. This is an upwards force that acts on any object submerged in a fluid. But there's nothing magical about
it - the buoyant force is just the net force caused by the fluid pressure, and since pressure increases with depth the net force is upwards.

While taking a bath, an ancient Greek physicist named Archimedes discovered that the upward buoyant force on a submerged object is equal to the
weight of the fluid that the object displaces (known as **Archimedes' principle**).

In this lesson we'll learn about the buoyant force, how it works and how to calculate it.

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