Two metal disks, one with radius ?1 = 2.50 cm and mass ?1 = 0.800 kg...
Two metal disks, one with radius ?1 = 2.50 cm and mass ?1 = 0.800 kg and the other with radius ?2 = 5.00 cm and mass ?2 = 1.60 kg are welded together and mounted on a frictionless axis through their common center as shown to the right. (a) What is the total moment of inertia of the system of two disks? (b) A light string is wrapped around the edge of the smaller disk and a 1.50 kg block is suspended from the free end of the string. How far will the mass have to descend to give the system of disks 21.0 J of rotational kinetic energy? (c) How many revolutions has the system of disks made after the mass has descended a distance of 4.00 m?
Homework Answers
Concept: use work energy principle to find the height fallen by the block which gives the system desired kinetic energy
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Two metal disks, one with radius ?1 = 2.50 cm and mass ?1 =
0.800 kg...
Two metal disks, one with radius R1 = 2.50 cm and mass M1 = 0.800 kg and the other with radius R2 = 5.10 cm and mass M2 = 1.70 kg
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2. A short metal cylinder of radius 24.0 cm, height 5.5 cm, and mass 4.25 kg is positioned on a flat surface with a frictionless pivot point at its center. A string is fixed to the outside of the cylinder and wrapped around several turns before leaving the cylinder and running parallel to the surface to a pulley which supports a hanging mass of 1.40 kg. The system is released from rest at time t0 (25) Calculate the angular acceleration...
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