181. A ball is thrown vertically upwards. Assuming the air resistance to be constant and considerable

1. 1. The time of ascent ∠ the time of descent

   
   
   

   2. the time of ascent ≠ the time of descent

   
   
   

   3. The time of ascent = the time of descent

   
   
   

   4. The time of ascent > the time of descent

   
   
   

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   N/A

   Correct Option: A

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182. When a fluid passes through the constricted part of a pipe, its

1. 1. Velocity and pressure decrease

   
   
   

   2. Velocity and pressure increase

   
   
   

   3. Velocity decrease and pressure increases

   
   
   

   4. Velocity increases and pressure decreases

   
   
   

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   N/A

   Correct Option: D

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183. A satellite revolves around the earth in a circular orbit, If gravitational pull suddenly disappear, then it

1. 1. Continues to move with the same speed along the same path

   
   
   

   2. Falls down with increasing speed

   
   
   

   3. Moves with the same speed tangential to the original orbit

   
   
   

   4. Comes to rest after moving a certain distance along the original path

   
   
   

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   N/A

   Correct Option: C

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184. 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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185. 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

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