56. If want to calculate the pressure of a liquid at the bottom of vessel, the quantity which is not required to determine it, is

1. 1. Height of the liquid column

   
   
   

   2. Surface area of the bottom of the vessel

   
   
   

   3. Density of the liquid

   
   
   

   4. Acceleration due to gravity at the bottom of the vessel

   
   
   

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   N/A

   Correct Option: B

   N/A

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57. A spherical body moves with uniform angular velocity (ω)around a circular path of radius r. Which one of the following statements

1. 1. the body has no acceleration

   
   
   

   2. The body has a radial acceleration ω² r directed toward centre of path

   
   
   

   3. The body has a radial acceleration 2 / 5 ω² r Directed away from the centre of the path

   
   
   

   4. The body has an acceleration ω² tangential to its path

   
   
   

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   N/A

   Correct Option: B

   N/A

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58. A man inside an artificial satellite feels weightlessness because the force of attraction due to earth is

1. 1. Zero at that earth is

   
   
   

   2. Is balanced by the force of attraction due to moon

   
   
   

   3. Equal to centripeated force

   
   
   

   4. Non-effective due to particular design of the satelltie

   
   
   

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   N/A

   Correct Option: A

   N/A

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59. An inflated balloon rises to a definite height once it starts going up. This balloon can not rise any further because at that height

1. 1. Atmosphere pressure reduces to zero

   
   
   

   2. Acceleration due to gravity reduces to zero

   
   
   

   3. Density of the balloon reduces to zero

   
   
   

   4. Apparent weight of the balloon reduces to zero

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

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60. If hole is bored along a diameter of the earth and a stone is dropped into the hole it will

1. 1. Reach the centre of the earth and stop there

   
   
   

   2. Reach the other side of the earth and stop there

   
   
   

   3. Execute S.H.M. about the centre of the earth

   
   
   

   4. Execute oscillatory, but not simple harmonic motion about the centre of earth

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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