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Physics: Multiple Choice Questions on Gravitation


1.

An Earth satellite of mass m revolves at a height h from the surface of the Earth. If R is the Earth's radius and g is the acceleration due to gravity at the surface of the Earth, then the velocity of the satellite is given by

 

 

 

 

2.

A satellite orbits at a height h above the Earth's surface. Let R be the Earth's radius. If Ve is the escape velocity and Vo is the orbital velocity of the satellite orbiting at a height h << R, then

  Ve = 2 Vo

  Ve = Vo

  Ve2 = 2 Vo2

  Vo2 = 2 Ve2

3.

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 by definition.

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

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

4.

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

5.

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

  C

  A

  B

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