# HW15(9) - Version 001 HW15 ross(15211 This print-out should...

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Version 001 – HW15 – ross – (15211) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. Changing Angular Speed 001 (part 1 of 3) 10.0 points As a result oF Friction, the angular speed oF a wheel c hanges with time according to dt = ω 0 e - σt , where ω 0 and σ are constants. The angular speed changes From an initial angular speed oF 4 . 75 rad / sto4 . 05 rad / sin33 . 93 s . Determine the magnitude oF the angular acceleration aFter 1 . 51 s. Correct answer: 0 . 0221611 rad / s 2 . 002 (part 2 of 3) 10.0 points How many revolutions does the wheel make aFter 2 . 76 s ? Correct answer: 2 . 07305 rev. 003 (part 3 of 3) 10.0 points ±ind the number oF revolutions it makes be- Fore coming to rest. Correct answer: 160 . 892 rev. Serway CP 07 17 004 (part 1 of 4) 10.0 points AbugisontherimoFadiskoFdiameter12in that moves From rest to an angular speed oF 78 rev / min in 5 . 7s. What is the tangential acceleration?

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HW15(9) - Version 001 HW15 ross(15211 This print-out should...

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