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Physics: Multiple Choice Questions on Gravitation


1.

A reference frame attached to the Earth

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

  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.

2.

If the radius of the Earth were increased by a factor of 2 and its mass remained the same, then the acceleration due to gravity on the Earth would

  increase by a factor of 4

  increase by a factor of 2

  reduce by a factor of 2

  reduce by a factor of 4

3.

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 = M2 / M1

  V1 / V2 = (M2 / M1)2

  V1 = V2

  V1 / V2 = M1 / M2

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

  F/C

  FC/2

  Zero.

5.

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

 

 

 

 

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