EB-06 Inertia Thing
This is designed to provide a simple, clean means of studying rotational dynamics. A 40 cm diameter disc is machined of aluminum plate, with provision made to locate three masses at any of seven radii on its upper surface.
Rotational torque is provided by a mass attached to a light cord passing over a pulley and wrapped around the hub. Since its mass is only 50 grams, disc acceleration is very slow-almost 15 seconds being required for the mass to fall a meter. This permits good, accurate, reproducible data, using only a meter stick, a stop watch, and balance. Of course a "Smart Pulley" can be used to send data to a computer for analysis.
Operation is beautifully smooth. Weight of apparatus is 7 kg.
EB-04 Centripetal Force Apparatus
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On the left is the Beck Centripetal Force Apparatus, designed to appeal to students, provide excellent data, and stay out of the repair shop. It is surprisingly heavy, the rotating assembly alone weighs almost three kg. |