Solved papers for JEE Main & Advanced JEE Main Paper (Held On 12 May 2012)

done JEE Main Paper (Held On 12 May 2012) Total Questions - 2

• question_answer1) A solid sphere is rolling on a surface as shown in figure, with a translational velocity \[v\,m\,{{s}^{-1}}.\] If it is to climb the inclined surface continuing to roll without slipping, then minimum velocity for this to happen is   JEE Main Online Paper (Held On 12 May 2012)
  A)
  \[\sqrt{2gh}\]                   
  done clear
  B)
                         \[\sqrt{\frac{7}{5}gh}\]
  done clear
  C)
                         \[\sqrt{\frac{7}{2}gh}\]                
  done clear
  D)
                         \[\sqrt{\frac{10}{7}gh}\]
  done clear
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• question_answer2) This question has Statement land Statement 2. Of the four choices given after the Statements, choose the one that best describes the two Statements.                 Statement 1: When moment of inertia/of a body rotating about an axis with angular speed \[\omega \]increases, its angular momentum L is unchanged but the kinetic energy K increases if there is no torque applied on it.                 Statement 2: \[L=I\omega ,\] kinetic energy of rotation \[=\frac{1}{2}I{{\omega }^{2}}\]   JEE Main Online Paper (Held On 12 May 2012)               
  A)
                  (a) Statement 1 is true, Statement 2 is true, Statement 2 is not the correct explanation of Statement 1.                
  done clear
  B)
                  (b) Statement 1 is false, Statement 2 is true.                
  done clear
  C)
                  (c) Statement 1 is true, Statement 2 is true. Statement 2 is correct explanation of the Statement 1.                
  done clear
  D)
                  (d) Statement 1 is true, Statement 2 is false.                
  done clear
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