1:   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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2:   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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3:   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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4:   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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5:   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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6:   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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7:   When a planet moves around the sun,its
Options:
  1. linear velocity is constant
  2. areal velocity is constant
  3. angular velocity is constant
  4. all of the above

Answer: Option 2

Explanation:

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8:   Which among the following quantities remain constant for a satellite in elliptical orbit?
Options:
  1. Angular momentum
  2. Momentum
  3. Total energy
  4. all of the above

Answer: Option 2

Explanation:

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9:   If a body is projected from earth's surface to become its satellite,its time period of revolution will not depend upon -----
Options:
  1. mass of earth
  2. gravitational constant
  3. its own mass
  4. radius of orbit

Answer: Option 3

Explanation:

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10:   The velocity with which a projectile must be fired to escape from the earth does not depend on ------
Options:
  1. mass of earth
  2. radius of earth
  3. both of the above
  4. mass of the projectile

Answer: Option 4

Explanation:

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