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Question

Three blocks A,B, and C are suspended as shown in figure. Mass of block A and B is m each. If the system is in equilibrium and mass of C is M, then 


  1. M2m
  2. M=2m
  3. M2m
  4. None of these


Solution

The correct option is C M2m

From FBD of C,
2Tcosθ=Mg
and from FBD of B,
T=mg
 2mgcosθ=Mg
cosθ=Mg2mg=M2m

If 0θ90, then  1cos θ0
Hence, 1M2m0
M2m
Option C is correct.

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