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Two blocks m1=5g and m2=10g are hung ver...

Two blocks `m_1=5g` and `m_2=10g` are hung vertically over a light frictionless pulley as shown in the figure.
What is the acceleration of the masses, when left free ? (Here, `g` is acceleration due to gravity)

A

`g//5`

B

`g//2`

C

`g`

D

`g//3`

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