91. A simple pendulum has a time period T₁ when on the earth's surface, and T₂ when taken to height R above the earth's surface, where R is radius of the earth the value of T₂ / T₁ Is

1. 1. 1

   
   
   

   2. √2

   
   
   

   3. 4

   
   
   

   4. 2

   
   
   

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   N/A

   Correct Option: D

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92. The young's modulus for perfectly rigid body is

1. 1. Zero

   
   
   

   2. 1

   
   
   

   3. Infinite

   
   
   

   4. None of these

   
   
   

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   N/A

   Correct Option: C

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93. A girl is swinging on a swing in the sitting position. How will the period of swing be affected if she stands up?

1. 1. The period will now be shorter

   
   
   

   2. The period will now be longer

   
   
   

   3. The period will remain unchanged

   
   
   

   4. None of the above

   
   
   

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   N/A

   Correct Option: A

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94. Consider the following statements
    The escape velocity depends on
    1. Mass of the planet
    2. Mass of the particles escaping
    3. Temperature of the planet
    4. Radius of the planet
    Select the correct answer from the codes given below
    Codes :
    

1. 1. 1 and 2

   
   
   

   2. 2 and 4

   
   
   

   3. 1 and 4

   
   
   

   4. 1, 3 and 4

   
   
   

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   N/A

   Correct Option: C

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95. A light body A and a heavy body B have equal kinetic energies of translation. Then

1. 1. A has larger momentum than B

   
   
   

   2. B has larger momentum than A

   
   
   

   3. A and B have same momentum

   
   
   

   4. none of the above

   
   
   

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   N/A

   Correct Option: B

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