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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.

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

  regions 1 and 2

  region 2

  region 1 and a portion of region 2

  region 1

3.

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

  Vo2 = 2 Ve2

  Ve = 2 Vo

  Ve2 = 2 Vo2

  Ve = Vo

4.

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

 

 

 

 

5.

The figure shows the elliptical orbit of a planet with the Sun at the focus. The areas of regions 1 and 2 are the same. If the planet takes times t1 to go from one end to the other end of region 1 and t2 to go from one end to the other end of region 2, then what is the relationship between t1 and t2?

  t1 > t2

  t1 = t2

  Cannot be determined

  t1 < t2

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