2 Mechanics 2.5 Rotational Motion
Mechanical conservation of energy / Maxwell's wheel
P2131800
Distance travelled by the centre of gravity of the Maxwell disk as a function of time.
Principle
Maxwell wheel
A disc, which can unroll with its axis on two cords, moves in the gravitational field. Potential energy, energy of translation and energy of rotation are converted into one another and are determined as a function of time. Tasks The moment of inertia of the Maxwell disc is determined. Using the Maxwell disc, 1. the potential energy, 2. the energy of translation, 3. the energy of rotation, are determined as a function of time. What you can learn about ▪ ▪ ▪ ▪ ▪ ▪ ▪
Maxwell disc Energy of translation, Energy of rotation Potential energy Moment of inertia Angular velocity, Angular acceleration Instantaneous velocity Gyroscope
Function and Applications Apparatus for conversion of potential to kinetic energy and viceversa (translation and rotation). Two aperatures at ends of axles keep wheel from running off its trajectory and are used, together with a light barrier, to measure translation velocity. Equipment and technical data
Main articles Light barrier with counter Maxwell wheel Holding device w. cable release Power supply 5 V DC/2.4 A with 4 mm plugs Meter scale, demo. l=1000mm Capacitor 100 nF/250V, G1
11207-30 02425-00 02417-04 11076-99 03001-00 39105-18
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▪ Metal wheel with support rod and adjustable suspension. ▪ Wheel diameter: 130 mm, Mass of wheel: 470g. ▪ Moment of inertia: 10 kg cm². Cord length: 800 mm, Diameter of shutter: 20 mm. 02425-00
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