question_answer

In a transverse wave the distance between a crest and neighboring trough at the same instant is 4.0 cm and the distance between a crest and trough at the same place is 1.0 cm. The next crest appears at the same place after a time interval of 0.4s.The maximum speed of the vibrating particles in the medium is:

A)  \[\frac{3\pi }{2}cm/s\]

B)  \[\frac{5\pi }{2}cm/s\]

C) \[\frac{\pi }{2}cm/s\]

D) \[2\pi cm/s\]