Einstein For Dummies by Calle Carlos I

Author:Calle, Carlos I. [Calle, Carlos I.]
Language: eng
Format: mobi, epub
Publisher: Wiley
Published: 2011-03-15T13:00:00+00:00

With his principle of equivalence, Einstein made Galileo’s observation the foundation of his new extended theory, the general theory of relativity. Another way to state Einstein’s principle of equivalence is by saying that

The gravitational mass and the inertial mass are the same, and no experiment can ever distinguish one from the other.

The Earth knows what to do

Because all objects fall to the ground with the same acceleration, the force with which the Earth pulls on objects of different masses must be different. The gravitational force of the Earth acts in exactly the right proportions on objects of different masses. If the mass is doubled, the gravitational force doubles. Because the inertial mass doubles, the resistance to this double gravitational force also doubles, producing the same acceleration as before.

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