1:   If the radius of earth is reduced by 1%, the escape velocity will be ----------
Options:
  1. decreased by about 1%
  2. increased by about 0.5%
  3. increased by about 1%
  4. remains the same

Answer: Option 2

Explanation:

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2:   An inclined plane makes an angle 30 degree with the horizontal.A solid sphere rolling down this inclined plane from rest without slipping has a linear acceleration equal to ----
Options:
  1. g/3
  2. 2g/3
  3. 5g/7
  4. 5g/14

Answer: Option 4

Explanation:

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3:   A diver in a swimming pool bends his head before diving ,because it---------
Options:
  1. decrease his angular velocity
  2. increase his moment of inertia
  3. decrease his moment of inertia
  4. all of the above

Answer: Option 3

Explanation:

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4:   An orbiting satellite has --------
Options:
  1. only kinetic energy
  2. only potential energy
  3. no energy
  4. kinetic and potential energy

Answer: Option 4

Explanation:

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5:   Unit of gravitational potential is --------
Options:
  1. Joule
  2. Joule kilogram
  3. both of the above
  4. Joule/kilogram

Answer: Option 4

Explanation:

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6:   The acceleration due to gravity near the surface of a planet of radius R and density d is proportional to --------
Options:
  1. d/R
  2. R/d
  3. dR
  4. none of the above

Answer: Option 3

Explanation:

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7:   The diameters of two planets are in the ratio 4:1and their mean densities are in the ratio 1:2.The acceleration due to gravity on the planets will be in the ratio of ----------
Options:
  1. 1:2
  2. 2:1
  3. 2:3
  4. 3:1

Answer: Option 2

Explanation:

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8:   The ratio of energy required to raise a satellite to a height h above the earth surface to that required to put it into the orbit is -------
Options:
  1. h:2R
  2. 2h:R
  3. R:h
  4. h:R

Answer: Option 2

Explanation:

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9:   What is not conserved in case of celestial bodies revolving around the sun all the time?
Options:
  1. Mass
  2. Angular momentum
  3. Kinetic energy
  4. all of the above

Answer: Option 3

Explanation:

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10:   The centripetal force on a satellite orbiting around the earth and the gravitational force of earth acting on the satellite both equal F.The net force on the satellite is ------
Options:
  1. zero
  2. F
  3. 1,414 F
  4. none of the above

Answer: Option 3

Explanation:

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If you continue doing what you have done in the past, you will get what you have received in the past.
-Avinash Narula