Two masses as shown are suspended from a massless pulley. Calculate the acceleration of the system when masses are left free :

Question

https://clay6.com/mpaimg/1_ne1.jpg

( A ) $\large\frac{g}{3}$
( B ) $\large\frac{g}{9}$
( C ) $\large\frac{2g}{3}$
( D ) $\large\frac{g}{7}$