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Physics: Multiple Choice Questions on Gravitation


1.

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

  region 2

  regions 1 and 2

  region 1 and a portion of region 2

  region 1

2.

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

 

 

 

 

3.

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

4.

A planet is moving around the Sun in a circular orbit of circumference C. The work done on the planet by the gravitational force F of the Sun is

  FC

  Zero.

  F/C

  FC/2

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

  reduce by a factor of 16

  remain Same

  increase by a factor of 4

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