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Physics of Sound

  1. The equation of a simple harmonic wave is given by
    y = 3 sin
    π
    (50 t - x)
    2

    Where x and y are in meters and t is in seconds. The ratio of maximum particle velocity to the wave velocity is​​
    1. 3
      π
      2
    2. 2
      π
      3

Correct Option: B

y = 3 sin
π
(50 t - x)
2

y = 3sin25πt -
π
x
2

on comparing with the standard wave equation ​y = a sin (ωt – kx) ​
Wave velocity , v =
ω
=
25π
= 50 m / sec
kπ / 2

The velocity of particle vp =
∂y
= 75π cos25πt -
π
x
∂t2

vpmax = 75π
then
vpmax
=
75π
=
v502



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