Toys and Physics – Magnetism
5.1. Magnetic toys – balls
on plate
What
happensThe idea of the game is to place all the six magnetic balls in the holes –
and then remove them again without them clumping together.
The other toys is a set
of magnets that 'float' above each other if placed correctly on the wooden
stand.
Theory and teaching notesThis is a very difficult game that
illustrates the principles of magnetic attraction. You also need a steady hand and an
appreciation of the direction in which the balls are magnetised.
The magnetic disc
must be placed with like poles facing each other to give mutual repulsion and the 'floating
effect'.
5.2 Magnetic wheel
What happensThe wheel moves along the
frame without coming off at the end.
Theory and teaching notesThe
axle is magnetic. The stremgth of the magnetism is just strong enough to keep it attached to
the frame as it moves along.
5.3 Magnetic chaos
wheel
What
happensYou spin one of the rotating set of magnets and watch the effect as it
interacts with the other. It seems virtually impossible to predict the way in which they will
move.
Theory and teaching notesThe interaction between the magnets
will affect the motion to a greater or lesser extent depending on just how much energy is put
into the system. The resulting motion depends critically on the speed at which you rotate one
set of magnets initially. Chaotic motion results with both sets of magnets spinning backwards
and forwards.
5.4 Floating barrage balloon
What happensThe
barrage balloon floats above the ground.
Theory and teaching
notesThere is a magnet in the balloon and in the ground. If these two magnets are
aligned with like poles facing each other they will repel and so the balloon will float.