Faculty of Mathematics, Physics
and Informatics
Comenius University Bratislava

# Using 3D Printing for the Introduction of Archimedes' Principle

Authors: Jarier Wannous, Milan Kováč

## Main Project Goals

• Design a tool using 3D print for the introduction of Archimedes' principle.
• Design activities for the introduction of Archimedes' principle using the printed tool.

## Archie

The tool Archie can be printed in two versions, a smaller and a larger one. Both versions consist of two partially hollow cylinders. The cylinders are marked on the outside in such a way that when they are immersed in a liquid their immersed volume can be measured. The smaller cylinder fits into the larger one. To combine the two parts of Archie a small rubber band is needed. The rubber band helps to combine the cylinders while also functioning as insulation preventing the liquid from entering Archie when it is immersed in it. Archie's mass can be changed by throwing coins inside it.

The smaller version of Archie consists of a smaller cylinder with a maximum volume of 80 ml and a larger cylinder with a maximum volume of 100 ml. To get the the stl files for printing this version of Archie please use the following links:

The larger version of Archie consists of a smaller cylinder with a maximum volume of 110 ml and a larger cylinder with a maximum volume of 150 ml. To get the the stl files for printing this version of Archie please use the following links:

We are also currently working on a transparent version of Archie which can also be used as a measuring cylinder.

## Student Worksheets and Instruction for Teachers

This section contains activities which can be done with Archie. While the activities are prepared for using Archie in the classroom, they are focused on student working independently or in small groups.

The following link offers student worksheets for the proposed activities, as well as instruction for realizing the activities prepared for teachers. To get the worksheets and the instructions, please use the following link: Worksheets.