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Physics: Multiple Choice Questions on Gravitation


1.

Consider a hole drilled into the Earth and an object placed at the bottom of the hole (point P) as shown in the figure. The gravitational force of attraction on the object will be due to

  region 1 and a portion of region 2

  region 2

  region 1

  regions 1 and 2

2.

Two satellites of masses M1 and M2 have escape velocities V1 and V2 from the surface of a planet of radius R with acceleration due to gravity g. Which of the following is true?

  V1 / V2 = M1 / M2

  V1 = V2

  V1 / V2 = (M2 / M1)2

  V1 / V2 = M2 / M1

3.

If the escape velocity of a rocket from the surface of the Earth is ve , then the escape velocity of the same rocket from the surface of a planet whose acceleration due to gravity as well as radius are 2 times that of the Earth is

  ve

  2 ve

  ve / 2

  4 ve

4.

If the distance between two masses is increased by a factor of 4, the gravitational force of attraction between them will

  reduce by a factor of 4

  reduce by a factor of 16

  remain Same

  increase by a factor of 4

5.

If a simple pendulum with a time period of 3 seconds is made to oscillate at a height R equal to the Earth's radius, then its time period at this height will be

  6 s

  1 / 6 s

  1 / 3 s

  3 s

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