Rotating System on Air Bed (115 V, 50/60 Hz) - 1000781
Apparatus for investigating frictionless rotation. A small rotating disc with a protractor scale supports a cross bar to which weights can be attached. The disc is supported by a bed of air in which its axis is centred. A driving weight is suspended from a hook at the end of a string that is passed over a single pulley on one side and a multiple pulley on the other. The rotation is very slow and can be measured using a stopwatch by hand. Alternatively, a digital timer may be used. This can be started by a mechanism that is supplied with the kit and halted by a signal from a laser reflection sensor when the wheel passes through angle zero.
Experiment topics:
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Rotational motion: uniform and under constant acceleration
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Newton's equations of motion for rotational motion
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Moment of inertia and torque
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Moment of inertia as determined by experiment
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Simple harmonic motion of rotating objects
Specifications:
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Protractor scale: 0 – 360°
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Scale divisions: 1°
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Length of cross bar: ca. 440 mm
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Radii of perforations: 30 – 210 mm
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Separation of perforations: 20 mm
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Radii of multiple pulley: 5.0 mm/10.0 mm/15.0 mm
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Moment of inertia of
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disc with cross bar: 0.16 g m2 approx.
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Maximum moment of inertia: 7.1 g m2 approx.
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Minimum driving torque: 0.05 mN m approx.
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Maximum driving torque: 0.60 mN m approx.
Contents:
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1 Air bed
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1 Rotating disc with cross bar
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1 Multiple pulley
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1 Release mechanism
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2 S-shaped hooks 1.00g
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1 S-shaped hook 2.00 g
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1 Set of weights (2x 12.5 g, 2x 25 g, 2x 50 g)
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1 Compressor for connection to mains
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1 Silicon tubing with by-pass valve (not illustrated)
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1 Pulley
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1 Stand rod with 3 securing screws and 2 screws for levelling
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1 Stand rod with 2 securing screws
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1 Stand rod, 250 mm
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1 Levelling disc
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1 Roll of cotton thread
28 x 13 x 11 in
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