Solved papers for JEE Main & Advanced JEE Main Paper (Held On 19 May 2012)

done JEE Main Paper (Held On 19 May 2012) Total Questions - 2

• question_answer1) Sand is being dropped on a conveyer belt at the rate of 2 kg per second. The force necessary to keep the belt moving with a constant speed of 3 \[\text{m}{{\text{s}}^{\text{-1}}}\]will be     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  12N                                       
  done clear
  B)
  6N
  done clear
  C)
  zero   
  done clear
  D)
  18N
  done clear
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• question_answer2) A block of weight crests on a horizontal floor with coefficient of static friction \[\mu .\]It is desired to make the block move by applying minimum amount of force. The angle \[\theta \] from the horizontal at which the force should be applied and magnitude of the force F are respectively.     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  \[\theta ={{\tan }^{-1}}\left( \mu  \right),F=\frac{\mu W}{\sqrt{1+{{\mu }^{2}}}}\]
  done clear
  B)
                         \[\theta ={{\tan }^{-1}}\left( \frac{1}{\mu } \right),F=\frac{\mu W}{\sqrt{1+{{\mu }^{2}}}}\]
  done clear
  C)
                         \[\theta =0,F=\mu W\]
  done clear
  D)
                         \[\theta ={{\tan }^{-1}}\left( \frac{\mu }{1+\mu } \right),F=\frac{\mu W}{1+\mu }\]
  done clear
  View Answer play_arrow