Rotational Inertia Demonstrator

A beautiful and engaging investigation of angular motion!

Observe the angular acceleration of the apparatus, and investigate the effects of changes in torque and inertia. Simply move the rope to a pulley of different radius to change the torque, or move the mass on the arm to change the moment of inertia. Qualitative observations are a snap, and students can easily see the dramatic effects of their adjustments. The apparatus lends itself to accurate quantitative experimentation as well, with two ways of finding the moment of inertia: theoretically, according to the component masses and their dimensions, and experimentally, by measuring the angular acceleration for a given torque.

Pully size:
Sm r = 20.20mm
Med r = 28.65mm
Lg r = 38.52mm

Ring Stand and Hooked Mass not included.