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Physics: Multiple Choice Questions on Gravitation


1.

If the distance between two masses is increased by a factor of 2, the gravitational force of attraction between them will

  reduce by a factor of 2

  reduce by a factor of 4

  increase by a factor of 2

  remain Same

2.

If the value of gravitational acceleration at a height h above the Earth's surface is the same as that at a depth d below the Earth's surface (with both h and d small compared to the Earth's radius R), then

  h = d2 / R

  h = 2 d

  h = d

  h = d / 2

3.

The gravitational acceleration on a planet is 20% less than that on the Earth. A rocket takes a man from the Earth to this planet. On neglecting the effect of all other bodies in the sky, which curve in the figure best describes the change in the man's weight with distance traveled?

  B

  A

  D

  C

4.

A satellite is moving around the Earth in a circular orbit with a velocity V. If the gravitational force of the Earth were to suddenly disappear, then the satellite would

  fall towards the surface of the Earth.

  move radially outwards with a velocity V.

  spirally move away from the Earth.

  move with a velocity V, tangentially to its circular orbit.

5.

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

  V1 / V2 = M1 / M2

  V1 / V2 = (M2 / M1)2

  V1 / V2 = M2 / M1

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