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**Unformatted text preview: **15.48: a) From comparison with Eq. (15.4 ) , A = 0.75 cm, λ = f = 125 Hz, T = 1 = 0.00800 s and v − λf = 6.25 m s. f b) 2 0.400 cm = 5.00 cm, c) To stay with a wavefront as t increases, x and so the wave is moving in the − x direction. d) From Eq. (15.13) , the tension is F = μv 2 = (0.50 kg m) (6.25 m s) 2 = 19.5 N. e) Pav =
1 2 μF ω2 A2 = 54.2 W. ...

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