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  2. Equivalence principle - Wikipedia

    en.wikipedia.org/wiki/Equivalence_principle

    The equivalence principle is the hypothesis that the observed equivalence of gravitational and inertial mass is a consequence of nature. The weak form, known for centuries, relates to masses of any composition in free fall taking the same trajectories and landing at identical times.

  3. Loránd Eötvös - Wikipedia

    en.wikipedia.org/wiki/Loránd_Eötvös

    The weak equivalence principle plays a prominent role in relativity theory and the Eötvös experiment was cited by Albert Einstein in his 1916 paper The Foundation of the General Theory of Relativity. Measurements of the gravitational gradient are important in applied geophysics, such as the location of petroleum deposits.

  4. Eötvös experiment - Wikipedia

    en.wikipedia.org/wiki/Eötvös_experiment

    In turn, these experiments led to the modern understanding of the equivalence principle encoded in general relativity, which states that the gravitational and inertial masses are the same. It is sufficient for the inertial mass to be proportional to the gravitational mass.

  5. Galileo's Leaning Tower of Pisa experiment - Wikipedia

    en.wikipedia.org/wiki/Galileo's_Leaning_Tower_of...

    The basic premise behind these experiments is now known as the (weak) equivalence principle. Galileo's hypothesis that inertial mass (resistance to acceleration) equals gravitational mass (weight) was extended by Albert Einstein to include special relativity and that combination became a key concept leading to the development of the modern ...

  6. Tests of general relativity - Wikipedia

    en.wikipedia.org/wiki/Tests_of_general_relativity

    Constraints on this, and on the existence of a composition-dependent fifth force or gravitational Yukawa interaction are very strong, and are discussed under fifth force and weak equivalence principle. A version of the equivalence principle, called the strong equivalence principle, asserts that self-gravitation falling bodies, such as stars ...

  7. Weak equivalence - Wikipedia

    en.wikipedia.org/wiki/Weak_equivalence

    Weak equivalence principle This page was last edited on 27 May 2024, at 02:43 (UTC). Text is available under the Creative Commons Attribution ...

  8. Mass - Wikipedia

    en.wikipedia.org/wiki/Mass

    The particular equivalence often referred to as the "Galilean equivalence principle" or the "weak equivalence principle" has the most important consequence for freely falling objects. Suppose an object has inertial and gravitational masses m and M , respectively.

  9. Mass–energy equivalence - Wikipedia

    en.wikipedia.org/wiki/Mass–energy_equivalence

    The mass–energy equivalence in special relativity refers to the inertial mass. However, already in the context of Newtonian gravity, the weak equivalence principle is postulated: the gravitational and the inertial mass of every object are the same. Thus, the mass–energy equivalence, combined with the weak equivalence principle, results in ...