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physics A-Level Physics
 
Solved problems for the chapter:
 

Gravitational Field

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Gravitational Field
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Detailed solution steps are available at:
 
https://en.openprof.com/wb/chapter:gravitational_field/4252/


Example 1.

State what is indicated by the direction of the gravitational field line at a point in a gravitational field.

    
Example 2.

State what is meant by a line of force in a gravitational field.

    
3.

Explain, with reference to gravitational field lines, why the gravitational field near the surface of the Earth is approximately constant for small changes in height.

    
4.

By reference to the pattern of the lines of gravitational force near to the surface of the Earth, explain why the acceleration of free fall near to the Earth’s surface is approximately constant.

    
5.

Gravitational fields and electric fields are two examples of fields of force. State one similarity and one difference between these two fields of force.

    
6.

The point P in the figure below represents a point mass. On the figure, draw lines to represent the gravitational field around P.


    
7.

A moon is in circular orbit around a planet. Explain why the path of the moon is circular.

    
8.

Explain what is meant by a gravitational field.

    

9.

State what is meant by a field of force.

    
10.

A gravitational field may be represented by lines of gravitational force. State what is meant by a line of gravitational force.

    
11.

State what is meant by a gravitational force.

    
12.

  • A spherical planet can be considered as a point mass at its centre. On the figure shown below, draw gravitational field lines outside the planet to represent the gravitational field due to the planet.


  • A satellite is in a circular orbit around the planet. Explain, with reference to your answer in (a), why the path of the satellite is circular.