| Rotational Inertia Demonstration – MAS 582 |  
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| 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. In order to understand rotational inertia, we should first review the equation for rotational inertia of a system of particles |
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| Inertia Demonstration Kit – MAS 581 |  |
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| Stand with a receptacle for a ball at the top. 18 mm ball, a square piece of sheet metal and a trigger of sheet metal included. Pulling and releasing the trigger causes the square sheet to slide out from under the ball, dropping the ball in the receptacle by inertia. | |
| Demonstrate inertia and Newton’s First Law of Motion in a very memorable way!
This classic apparatus is standard for a reason – it works, and it’s impressive! Rest the ball on top of the square that is set on the vertical post. Release the spring and the square is projected out. The ball falls into place on the post, remaining at rest as if nothing happened. |
