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Physics: Multiple Choice Questions on Gravitation


1.

If the distance between two masses is increased by a factor of 3, the gravitational force of attraction between them will

  remain Same

  reduce by a factor of 9

  increase by a factor of 3

  reduce by a factor of 3

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 = M2 / M1

  V1 = V2

  V1 / V2 = (M2 / M1)2

3.

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.

4.

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?

  D

  A

  C

  B

5.

A reference frame attached to the Earth

  is not an inertial frame because the Earth moves with respect to the Sun.

  is an inertial frame because Newton's laws of motion are applicable inside it.

  is an inertial frame by definition.

  cannot be an inertial frame of reference because of the Earth's rotation and revolution.

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