It is a demonstration of the ‘Moment of Inertia’. The mass itself and the distance of the mass from the centre of the cylinder determines how quickly it will accelerate. The effect
can be called also “Angular Momentum”. The cylinder with the mass concentrated towards the centre rolls faster. The cylinder with the mass concentrated towards the outside accelerates much more slowly because the same magnitude of mass must travel a greater distance around the curve of the cylinder.

Made of metal & plastic.

Size: 56mm (L) x 46mm (D)

Note: Take care not to drop or damage the cylinders – particularly the cylinder with the plastic on the outside.