Tension is maintained in a string as in Figure P13.57. The observed wave speed is $24 \mathrm{~m} / \mathrm{s}$ when the suspended mass is $3.0 \mathrm{~kg}$. (a) What is the mass per unit length of the string? (b) What is the wave speed when the suspended mass is 2.0 $\mathrm{kg}$ ?
Added by Jimmy M.
Step 1
We can rearrange this formula to solve for μ: μ = T/v^2. The tension in the string is equal to the weight of the suspended mass, so T = mg = (3.0 kg)(9.8 m/s^2) = 29.4 N. Substituting these values into the formula gives μ = (29.4 N) / (24 m/s)^2 = 0.051 kg/m. Show more…
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