Balancing Nails

A orange and blue exhibit table with a matching information panel on top, as well as black steel rods that are balancing amongst one another on a single stand.
A orange and blue exhibit table with a matching information panel on top, as well as black steel rods that are balancing amongst one another on a single stand.

Centre of mass can be used to hang objects together.

How it works

Balance six loose 'nails' on top of one 'nail' to explore centre of mass.

Things to try or ask around the exhibit

Can you balance the six loose nails on top of the one stuck to the table? (None of these six nails should touch the table!)

Background

Things balance better if most of the mass hangs as low as possible.

Finding the science in your world

People have used this technique to build houses and huts without nails.