A wave traveling along a string is described by the equation y(x, t) = A sin(kx

Practice Questions

Q1
A wave traveling along a string is described by the equation y(x, t) = A sin(kx - ωt). What is the phase velocity of the wave?
  1. A/k
  2. ω/k
  3. k/ω

Questions & Step-by-Step Solutions

A wave traveling along a string is described by the equation y(x, t) = A sin(kx - ωt). What is the phase velocity of the wave?
  • Step 1: Identify the wave equation given, which is y(x, t) = A sin(kx - ωt).
  • Step 2: Recognize that in the equation, k represents the wave number and ω represents the angular frequency.
  • Step 3: Understand that the phase velocity (v) of a wave is the speed at which a point of constant phase travels.
  • Step 4: Use the formula for phase velocity, which is v = ω/k.
  • Step 5: Substitute the values of ω and k from the wave equation into the formula to find the phase velocity.
  • Wave Equation – The equation y(x, t) = A sin(kx - ωt) represents a sinusoidal wave, where A is amplitude, k is the wave number, and ω is the angular frequency.
  • Phase Velocity – Phase velocity is the speed at which a point of constant phase travels along the wave, calculated as v = ω/k.
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