Question

option 1 is the correct answer.......plz explain me why...??​

Answer 1

Answer:

Assume that angle of string Connecting A and B is 2 alpha .

Now Find tension in string connecting block C .

See picture

Using symmetry

$T = mg \\ \\ at \: point \:c \\ 2T \cos( \alpha ) =Mg \\ \\ 2mg \cos( \alpha ) = Mg \\ \\ M = 2m \cos( \alpha ) \\ \\ but \: we \: know \: that \\ \cos( \alpha ) \leqslant 1 \\ so \\ \\ M \leqslant 2m(1) \\ \\ \huge \orange{M \leqslant 2m}$

Answer 2

Answer:

If tension in strings A and B is=T =Mg

If it make an angle X WITH STRING C THEN

2Tcos(X)=Mg

Then 2mcos(X)=M

if we consider the values of cos function option 1 is correct

Explanation: