PH101 HW Rotational Kinematics 1

PH101 HW Rotational Kinematics 1 - This print-out should...

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This print-out should have 22 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 oF 2) 10.0 points Ar e c o r dh a sa na n g u l a rs p e e do F 19 . 4rev / min. What is its angular speed? Correct answer: 2 . 03156 rad / s. Explanation: Let : ω =19 . 4rev / min . ω =(19 . 4rev / min) ± 2 π rad rev ²± 1min 60 s ² = 2 . 03156 rad / s . 002 (part 2 oF 2) 10.0 points Through what angle does it rotate in 0 . 82 s? Correct answer: 1 . 66588 rad. Explanation: Let : t =0 . 82 s . θ = ωt =(2 . 03156 rad / s) (0 . 82 s) = 1 . 66588 rad . 003 (part 1 oF 4) 10.0 points Consider the Following values ω avg Δ θ Δ t a +2 . 1rad 10 . 6s +0 . 99 rev / s b 0 . 50 s c - 1 . 5turns 1 . 7s +1 . 1 π rad / s+ 2 . 0 π rad d What is the value oF a ? Correct answer: 0 . 198113 rad / s. Explanation: Let : Δ θ =+2 . 1a n d Δ t =10 . 6s . ω avg = Δ θ Δ t = +2 . 1rad 10 . 6s = 0 . 198113 rad / s . 004 (part 2 oF 4) 10.0 points What is the value oF b ? Correct answer: 3 . 11018 rad. Explanation: Let : ω avg =+0 . 99 rev / sa n d Δ t =0 . 50 s . Δ θ = ω avg Δ t =(+0 . 99 rev / s) ± 2 π rad 1rev ² (0 . 5s) = 3 . 11018 rad . 005 (part 3 oF 4) 10.0 points What is the value oF c ? Correct answer: - 5 . 54399 rad / s. Explanation: Let : Δ θ = - 1 . 5turns and Δ t =1 . 7s . ω avg = Δ θ Δ t = - 1 . 5turns 1 . 7s
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006 (part 4 of 4) 10.0 points What is the value of d ? Correct answer: 1 . 81818 s. Explanation: Let : ω avg =+1 . 1 π rad / s , and Δ θ =+2 . 0 π rad . Δ t = Δ θ ω avg = +2 π rad +1 . 1 π rad / s = 1 . 81818 s . 007 (part 1 of 2) 10.0 points Adent ist ’sdr i l lstartsfromrest . After4
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This note was uploaded on 10/03/2010 for the course PH 101 taught by Professor Jones,s during the Spring '08 term at Alabama.

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PH101 HW Rotational Kinematics 1 - This print-out should...

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