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A small ball B of mass m is suspended with light inelastic string of length L from a block A of same mass m which can move on smooth horizontal surface as shown in the figure. The ball is displaced by angle q from equilibrium position & then released. Maximum velocity of block during subsequent motion of the system after release of ball is

  1. left square bracket g l left parenthesis 1 minus c o s invisible function application theta right parenthesis right square bracket to the power of 1 divided by 2 end exponent    
  2. left square bracket 2 g l left parenthesis 1 minus c o s invisible function application theta right parenthesis right square bracket to the power of 1 divided by 2 end exponent    
  3. left square bracket g l c o s invisible function application theta right square bracket to the power of 1 divided by 2 end exponent    
  4. information’s are insufficient to decide    

The correct answer is: left square bracket g l left parenthesis 1 minus c o s invisible function application theta right parenthesis right square bracket to the power of 1 divided by 2 end exponent

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