2nd year of post-compulsory secondary education
Gravitational fields
José Luis San Emeterio
 GRAVF 
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Evaluation
  • Do you understand the process which led to the establishment of the law of universal gravitation and its relation to Kepler's empirical laws?
  • Can you explain the importance of the law of gravitation for understanding the movements of the astronomical objects in the solar system, of artificial satellites and of the tides?
  • Do you understand the meaning of the concepts of field intensity and potential gravitational energy?
  • Do you understand how local phenomena such as the rotation of the Earth can alter our perception of gravity?
  • Can you make predictions about the values of field intensity, the orbital data of satellites or energy, in simple cases of gravitational phenomena?

You can check your knowledge by answering the following questions:

Evaluation

Historical background
Freely falling bodies
Two theories of the universe
Kepler's laws
Conclusions
The force of gravity
Newton's law
The superposition of forces
Angular momentum and central force
Conclusions
Field intensity
The concept of field intensity
Variations according to position
Conclusions
Energy in the gravitational field
Gravitational potential energy
Equipotential surfaces and lines of force
Conclusions
Some consequences of the theory
Explanation of the tides
The movement of artificial satellites
Coherence of galaxies
Conclusions
Evaluation