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Buoyancy

Figure from experiment 32 from Middle School Science with Vernier

Introduction

When an object is immersed in water, it pushes water aside. The buoyant force of water on the object reduces the weight of the object. In this experiment, you will determine and compare the buoyant force on an object and the weight of the water pushed aside (displaced) by the object for three objects. The Greek mathematician Archimedes first studied this relationship during the third century B.C.

Objectives

In this experiment, you will

  • Use a Force Sensor to measure the weights of objects in and out of water.
  • Determine the buoyant force of water on each object.
  • Determine the weight of water displaced by each object.
  • Compare buoyant force to weight of water displaced for each object.
  • Use the results of the experiment to explain why objects sink or float.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Option 1

Option 2

Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

Standards Correlations

See all standards correlations for Middle School Science with Vernier »

Experiment 32 from Middle School Science with Vernier Lab Book

<em>Middle School Science with Vernier</em> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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