Submarine: How to sink? How to float?
Have you ever tried to push a ball under water? Have you noticed how hard it is? And how it gets harder as you try larger balls? Submarines are actually like a huge ball or a ship. Have you ever wondered how can they go under water? or how much force is needed to push them down?

Inside a submarine is empty space for the most part and workers are working there and living there for many months. Submarines are among the most amazing machines.

 Project description
In this project you will study the forces that make a submarine go under water and come back up to the surface. Find out what is the relation between the size of a submarine and the force needed to take it down. 

This is mainly a display (demonstration) project; however, with some additions you may use it as an experimental project and have results tables and graphs for it.

 Details of this project
Support or more details on this project is available for the members of Material needed for the experiment or a science kit about this title may be available at