3B Scientific

Rotating System on Air Bed @230V

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3B Scientific #1000782 Specifications

  • Country of Origin (subject to change): Unknown

Description

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: Rotational motion: uniform and under constant acceleration Newton's equations of motion for rotational motion Moment of inertia and torque Moment of inertia as determined by experiment Simple harmonic motion of rotating objects Specifications: Protractor scale: 0 – 360° Scale divisions: 1° Length of cross bar: ca. 440 mm Radii of perforations: 30 – 210 mm Separation of perforations: 20 mm Radii of multiple pulley: 5.0 mm/10.0 mm/15.0 mm Moment of inertia of disc with cross bar: 0.16 g m2 approx. Maximum moment of inertia: 7.1 g m2 approx. Minimum driving torque: 0.05 mN m approx. Maximum driving torque: 0.60 mN m approx. Contents: 1 Air bed 1 Rotating disc with cross bar 1 Multiple pulley 1 Release mechanism 2 S-shaped hooks 1.00g 1 S-shaped hook 2.00 g 1 Set of weights (2x 12.5 g, 2x 25 g, 2x 50 g) 1 Compressor for connection to mains 1 Silicon tubing with by-pass valve (not illustrated) 1 Pulley 1 Stand rod with 3 securing screws and 2 screws for levelling 1 Stand rod with 2 securing screws 1 Stand rod, 250 mm 1 Levelling disc 1 Roll of cotton thread

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