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phys101_HW_Week_8_F_2009_2010

phys101_HW_Week_8_F_2009_2010 - 2 If the system is rotating...

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Name:______________________________________________________________ e-mail: _____________________________________________ Section:______________________ Homework Week Eight - Chapter 9 Rotation of Rigid Bodies DUE MON 11/23 in Lecture FOR CREDIT YOU MUST SHOW ALL WORK, PLEASE! 25 Points each. Section ( Circle One ): 001 12807 WF 02:00 pm - 02:50 pm Hayley L Finley 002 12808 WF 03:00 pm - 03:50 pm Hayley L Finley 003 15552 WF 09:00 am - 09:50 am Vishal P Kasliwal 004 15553 WF 04:00 pm - 04:50 pm Vishal P Kasliwal 1. Small blocks, each with a mass “m”, are clamped to each end and at the center of a rod with length L of negligible mass. Compute the moment of inertia of the system about an axis perpendicular to the rod and passing through the rod a.) at one end of the rod. b.) at the center of the rod c.) at a point ¼ the length from the center.
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Unformatted text preview: 2. If the system is rotating at 30 rpm, find the kinetic energy of the system in question 1 if the system is rotating about an axis that is perpendicular to the rod and passing through the rod a.) at one end of the rod. b.) at the center of the rod c.) at a point ¼ the length from the center. 3. Two hanging masses m 1 = 25 kg and m 2 = 20 kg are tied to a string, of negligible mass,which passes over a pulley. The masses are at the same height when released from rest. What is the magnitude of the velocity of the two masses after m 1 has dropped a distance of 0.5 meters? Treat the pulley as a thin disk of mass of 10 kg and a radius of 5.0 cm. 4. A rod has mass M and length L and a uniform density. Calculate the moment of inertia using: a.) I = ∫ r 2 dm b.) the parallel axis theorem....
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