Variable Inertia Bar

It is used to demonstrate the variation in torque required to drive a flywheel as its inertia is varies. A steel bar carries two heavy cylindrical masses those can be moved and locked by fly knobs. The bar is gripped by a boss head connected through ball bearing in a light alloy clamping block to a steel shaft held in a position by a metal collar. The shaft has a hole drilled near the end to accept cord for drive by falling mass. Whole assembly can be clamped on vertical support rod through a hole and thumbscrew fitted on clamping block