166. The figure below shows a snapshot of a transverse wave on a string at moment $t_1$. At moment $t_2 = t_1 + \dfrac{9}{400}$ s, which of the following is correct? [Figure: A transverse wave on a string moving with $v = 10\,\dfrac{\text{m}}{\text{s}}$ to the right; points A and B are marked on the wave; x-axis in cm with value 30 shown; y-axis shown.]
The velocity of point B is zero.
The velocity of point A is maximum.
Point A is moving in the negative direction.
Point B is moving in the negative direction.
\textbf{166.} The figure below shows a snapshot of a transverse wave on a string at moment $t_1$. At moment $t_2 = t_1 + \dfrac{9}{400}$ s, which of the following is correct?
\textit{[Figure: A transverse wave on a string moving with $v = 10\,\dfrac{\text{m}}{\text{s}}$ to the right; points A and B are marked on the wave; x-axis in cm with value 30 shown; y-axis shown.]}
\begin{enumerate}
\item The velocity of point B is zero.
\item The velocity of point A is maximum.
\item Point A is moving in the negative direction.
\item Point B is moving in the negative direction.
\end{enumerate}
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