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JAMB Physics 1994 Question 28

Question 28

Waves

The equation of tranverse wave travelling along a string is given by y = 0.3 sin (0.5x − 50t) where y and x are in cm and t is in seconds. Find the maximum displacement of the particles from the equilibrium position.

  1. A.50.0cm
  2. B.2.5cm
  3. C.0.5cm
  4. D.0.3cm
Show the answer and explanation

Answer: D (0.3cm)

Explanation

Compare with y = A sin(kx − ωt): the amplitude (maximum displacement) is A = 0.3 cm.