If the mass of the body A is m. Find the mass of the body B in terms of mass of the body A for the system to be in equilibrium.
A
2m
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B
m2
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C
3m
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D
m3
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Solution
The correct option is A2m FBDs of the bodies A,B and the movable pulley are as shown. From the equilibrium condition, we have T=mg And, T′=2T And, T′=mB.g=2T ⇒T=mB.g2 ⇒2mg=mBg⟹mB=2m