$M_{A} g \cos 37+N_{\text {wall }} \cos 53=N_{A}$
$N_{A B}+M_{A} g \sin 37=N_{\text {wall }} \sin 53$
$N_{A B}=M g \sin 37$
$N_{B}=M g \cos 37$
$M_{A}=2$
$M_{B}=4$
$N_{A B}=4 g \times \frac{5}{3}=\frac{12 g}{5}$
$\frac{12 g}{5}+2 g \times \frac{3}{5}=N_{\text {wall}} \frac{4}{5}$
$\frac{18 g}{5}=N_{w a l l} \times \frac{4}{5}$
$N_{\text {wall }}=\frac{9 g}{2}=45$
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$y\left( {x,t} \right) = 2\,\sin \,\left( {\frac{{2\pi }}{3}x} \right)\,\cos \,\left( {100\,\pi t} \right)$
where $x$ and $y$ are in $cm$ and $t$ is in $s$. Which of the following statements is correct ?
