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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 = Vo

  Ve2 = 2 Vo2

  Vo2 = 2 Ve2

  Ve = 2 Vo

3.

The ratio of the time periods for two satellites of equal mass in circular orbits of radii R and 16 R is

  64 : 1

  1 : 16

  1 : 64

  16 : 1

4.

If the radius of the Earth were increased by a factor of 3 and its mass remained the same, then the acceleration due to gravity on the Earth would

  reduce by a factor of 9

  increase by a factor of 9

  reduce by a factor of 3

  increase by a factor of 3

5.

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

  increase by a factor of 4

  remain Same

  reduce by a factor of 16

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