The HTM79 Inertia in Rotational Motion apparatus is a compact bench mounted unit allowing the study of rotational inertia against the affect of varying rotational mass, radius of gyration and mass distribution.
A sturdy based plate contains two vertical rods. One supports a pulley wheel over which runs the test cord, whilst the other vertical rod supports a bearing housing onto which all the test bodies are easily attached. To minimize friction, the bearing housing contains two precision bearings.
Three test bodies are supplied: solid cylinder, hollow cylinder and rectangular bar. All mount quickly and easily to the bearing housing. Clamp on weights are provided which easily and quickly attach to the rectangular bar using plastic screws. The radius of gyration of the clamp on weights can be easily adjusted and measured.
If required the vertical position of the masses can be adjusted accurately and measured using the tape measure provided.
The test bodies are driven using a cord. The cord is attached and wrapped around the bearing housing, and runs over a pulley on one of the vertical rods and terminates at a load hanger. The load hanger drops over the edge of the workbench.
Two methods of timing can be performed; time the drop of the load hanger over a known distance or time a set number of rotations of the test body. For the latter method a reference point is positioned on both the test body and pulley block.
The load hanger carries slotted weights, which vary the driving force being applied to the rotating bodies. A comprehensive instruction manual for student and lecturer is provided along with a 2 year warranty.