Question
In the given arrangement all surfaces are smooth. What acceleration should be given to the system, for which the block $m_2$ doesn't slide down?
✓
Answer
(a)
as $m _2$ does not move
therefore $T=m_2 g$
force acting on $m _1$ ==> $ T = m _1 a$
$m _2 g = m _1 a$
$a =\frac{ m _2 g }{ m _1}$
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