This apparatus enables experiments to be performed on rotational motion in general. Weights can be fitted to a rotating rod at marked distances from the centre. A dumbbell-shaped arrangement is thus created; the inertia properties of this arrangement can be changed easily and recalculated. The arrangement is fitted to a low friction ball bearing mounted rotating drum. The system is accelerated by a metal weight attached to a cord wrapped around the drum. The time taken for the weight to fall is measured using a stopwatch, the moment of inertia of the object can then be
determined. The experiment is set up quickly using the wall mounted stands. it is ideally suited to group work for 2-3persons
Experiments
- Explanation of the term “moment of inertia”.
- Determination of the moment of inertia of various bodies.
- Influence of the rotating mass on the moment of inertia.
- Influence of the radius of rotation on the moment of inertia.
- Comparison of the moments of inertia of solid and hollow cylinders of the same weight and outside diameter.
Specifications
- Student experiments on moments of inertia, comparison of the inertia of rotation of various bodies
- Metal rotating bar, weights with knurled bolts for quick fastening
- Solid and hollow test cylinders
- Ball bearing mounted rotating drum, anodised aluminium
- Acceleration of system by weight attached to the drum
