If you were to set the X weight to 2 what do you think the angle might be?

Attach weights of 1, 2, 4, and 8 units to the four attachment points on the bar. Move the bar from side to side until you find a balance point. Is it possible to predict that position?

A ball whooshes down a slide and hits another ball which flies off the slide horizontally as a projectile. How far does it go?

Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?

A cone is glued to a hemisphere. When you place it on a table in what position does it come to rest?

As this is a tool for modelling and investigating the spread of epidemics we will publish any more interesting results sent in.

An article for teachers and pupils that encourages you to look at the mathematical properties of similar games.

The second of two articles explaining how to include talk in maths presentations.