M is the quality of the disc 2.Measure the moment of inertia of the ring with a three-disc, the formula is 1.Measure the moment of inertia of the disc with a three-disc, the formula is I0=(mRrgT²)/(4²H) M is the quality of the disc 2.Measure the moment of inertia of the ring with a three-disc, the formula is I=/(4²H)-I0 M is the quality of the ring, the ring is placed as the figure 2 shown. T is the rotation of cycle of the down disc, H is the distance between the two disc.Ħ 1.Measure the moment of inertia of the disc with a three-disc, the formula is I0=(mRrgT²)/(4²H) r is the radius of the circumscribed circle constituted with the three hanging point of the down disc. When objects on disk and the disk rotating around the axis of symmetry, measure the moment of inertia with a three-disc, the formula is I=(mRrgT²)/(4²H) In the formula: m is the quality, R is the radius of the circumscribed circle constituted with the three hanging point of the up disc. T is the rotation of cycle of the down disc, H is the distance between the two disc. Shown in figure 1.ĥ When objects on disk and the disk rotating around the axis of symmetry, measure the moment of inertia with a three-disc, the formula is I=(mRrgT²)/(4²H) In the formula: m is the quality, R is the radius of the circumscribed circle constituted with the three hanging point of the up disc. Three hanging points of each disc were connected to be an equilateral triangle which is inscribed circle. With three lines which length is equal, B is hanging on the disc A. Experimental principle Three-wire pendulum are constituted of the two disc A and B, both with uniform quality.
Three-wire pendulum are constituted of the two disc A and B, both with uniform quality. Three-wire pendulum, bubble level, steel tape measure, stopwatch, tested ring, cylinder under test Instruments of experiment Three-wire pendulum, bubble level, steel tape measure, stopwatch, tested ring, cylinder under test Test Parallel axis theorem of the moment of inertia
Learn to use the three-wire pendulum to measure the moment of inertia of disk and ring round the axis of symmetry 4. Master the correct method of measuring the length, the quality and the time 3. Master the principles and method of the moment of inertia measured by three-wire pendulum 2. School of Electronics & Applied Physics, Hefei University of Technologyġ.
#Moment of inertia of a circle wire manual
The instruction manual contains experimental configurations, principles, step-by-step instructions, and examples of experiment results. Please click Experiment Theoryand Contents to find more information about this apparatus.1 Moment of inertia measured by three-wire pendulum Verify the parallel axis theorem of moment of inertia Measure the moment of inertia of two objects of same mass but with different mass distributionģ. Measure the moment of inertia using the three-string pendulum methodĢ. Using this apparatus, the following experiments can be conducted:ġ. Through the experiments, students can understand the physical principle of the moment of inertia and learn the measurement method with factors related to the amount of moment of inertia. A photoelectric sensor combined with a time counting device is used to measure the torsional oscillation period of a hanging plate.
This apparatus uses the three-string pendulum method to determine the moment of inertia of a rigid body. It is dependent on the mass distribution and the shaft position of the rigid body. Moment of inertia is a physical quantity for the representation of the inertial amount of a rotational object.
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