# Homework 9 - Abd Elhai, Mohamed – Homework 9 – Due: Apr...

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Unformatted text preview: Abd Elhai, Mohamed – Homework 9 – Due: Apr 14 2008, 9:00 pm – Inst: Dr Kevin Dean 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. This is ONLINE HOMEWORK No. 9 It is due by 06:00 AM Abu Dhabi Time on Tuesday 15 April (9:00 PM Monday 14 April, Texas time). 001 (part 1 of 2) 5 points The turntable of a record player rotates at a rate of 49 . 6 rev / min and takes 62 s to come to rest when switched off. Calculate the magnitude of its angular ac- celeration. Answer in units of rad / s 2 . 002 (part 2 of 2) 5 points Calculate the number of revolutions it makes before coming to rest. Answer in units of rev. 003 (part 1 of 2) 5 points Four particles with masses 5 kg, 3 kg, 4 kg, and 5 kg are connected by rigid rods of negli- gible mass at the corners of a rectangle. The origin is at the center of the figure. x y O ω 4m 8 m 5 kg 3 kg 4 kg 5 kg What is the moment of inertia about the y-axis? Answer in units of kg · m 2 . 004 (part 2 of 2) 5 points If the system rotates around the z-axis at an angular velocity of 7 rad / s, what is the kinetic energy of the system? Answer in units of J....
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## This note was uploaded on 02/16/2010 for the course PHYSICS 191262 taught by Professor Najafzadeh during the Spring '09 term at The Petroleum Institute.

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Homework 9 - Abd Elhai, Mohamed – Homework 9 – Due: Apr...

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