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A light semi cylindrical gate of radius R is piovted at its mid point O, of the diameter as shown in the figure holding liquid of density r. The force F required to prevent the rotation of the gate is equal to
  • a)
     2pR3rg
  • b)
    2rgR3l
  • c)
  • d)
    None of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A light semi cylindrical gate of radius R is piovted at its mid point ...
The force is normal to the surface of the cylinder and hence will pass through the centre. And since the forces pass through the centre it means that the net torque will be zero.
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Most Upvoted Answer
A light semi cylindrical gate of radius R is piovted at its mid point ...
Pi d g R^3/3        (d=density) 
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Community Answer
A light semi cylindrical gate of radius R is piovted at its mid point ...
0 all forces passes through O so no torque
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A light semi cylindrical gate of radius R is piovted at its mid point O, of the diameter as shown in the figure holding liquid of density r. The force F required to prevent the rotationof the gate is equal toa)2pR3rgb)2rgR3lc)d)None of theseCorrect answer is option 'D'. Can you explain this answer?
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