A pulley fixed to the ceilling carries a string with blocks of mass m – McqOptions

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1.	A pulley fixed to the ceilling carries a string with blocks of mass m and 3 m attached to its ends. The masses of string and pulley are negligible. When the system is released, its centre of mass moves with what acceleration [UPSEAT 2002]
A.	0
B.	\[g/4\]
C.	\[g/2\]
D.	\[-g/2\]
Answer» C. \[g/2\]

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