480_Physics ProblemsTechnical Physics

480_Physics ProblemsTechnical Physics - 482 P16.29 Wave...

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482 Wave Motion P16.29 If the tension in the wire is T , the tensile stress is Stress == T A TA so stress af . The speed of transverse waves in the wire is v T A m L m AL m = = = µρ Stress Stress Stress Stress Volume where ρ is the density. The maximum velocity occurs when the stress is a maximum: v max . = × = 270 10 185 8 Pa 7 860 kg m ms 3 . P16.30 From the free-body diagram mg T = 2s i n θ T mg = 2sin The angle is found from cos 3 8 2 3 4 L L ∴= ° 41 4 . FIG. P16.30 (a) v T = µ v mg m = ° = ×° F H G G I K J J 24 1 4 980 2 8 00 10 41 4 3 sin . . .s i n . ±ms kg m 2 ej or vm = F H G I K J 30 4 . kg (b) 60 0 30 4 . . and m = 389 k g P16.31 The total time is the sum of the two times. In each wire t L v L T Let A represent the cross-sectional area of one wire. The mass of one wire can be written both as
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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