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PRACTICE / Speed of waves on a string

Infer tension from wave speed

A string has linear mass density 0.004 kg/m and supports waves at 50 m/s.

Find its tension.

Organize the givens & assumptions
  • μ = 0.004 kg/m
  • v = 50 m/s

Flexible uniform string; small transverse oscillations; constant tension and linear mass density.

  1. A20 N20\ \mathrm N
  2. B10 N10\ \mathrm N
  3. C0.20 N0.20\ \mathrm N
  4. D625000 N625000\ \mathrm N

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