The given graph illustrates a transverse wave travelling on a string at a particular instant, and the points $P, Q, R$ and $S$ represent elements of the string. Which of the following statements about the motion of the elements is correct?
  • AThe speed of the element at $P$ is a maximum
  • BThe displacement of the element at $Q$ is always zero.
  • CThe energy of the element at $R$ is entirely kinetic
  • DThe acceleration of the element at $S$ is maximum.
Medium
art

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