Find the value of M in terms of m if the system is in equilibrium.
A
2m
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B
m
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C
m2
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D
m3
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Solution
The correct option is Bm FBDs of the body B, middle pulley and body A is as shown. From the condition of equilibrium, we have T′=mg and T′=2T ⟹T=mg2......(i) And, 2T=Mg Using (i), we get ⟹2×mg2=Mg ⇒M=m