Thank you for reporting, we will resolve it shortly
Q.
If the string & all the pulleys are ideal, acceleration of mass $m$ is
Laws of Motion
Solution:
As net force on a massless object is always zero.
for the pulley $D$,
equating the forces,
g the forces,
$2T = T$
$\therefore T=0$
$mg - T = ma$
$\therefore a_{m}=g \downarrow$
