• 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: