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Question

A transverse wave described by

y=(0.02 m)sin[(1.0 m1)x+(30 s1)t]

propagates on a stretched string having a linear mass density of 1.2×104kg m1. Find the tension in the string.

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Solution

m = mass per unit length

=1.2×104kg/m

Y = (0.02 m) sin

[1.0 m1x+(30 s1)t]

Here, k=1 m1=2πλ

w=30s1=2πf

Velocity of the wave in the stretched string

v=λf=ωk=30I

=30 m/s

v=(Tm)

30=(T1.2×104N)

t=10.8×102N

T=0.08 Newton


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