Is active gravitational mass equal to inertial mass?

M. Enosh*, A. Kovetz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


It is possible, within the framework of general relativity, to define an active gravitational mass density of incoherent matter. It is not equal to the inertial mass density, except when at rest. The concept can be specialized to a single massive particle; again, its active gravitational mass is not equal to its inertial mass, except when it rests. A measurement of the impulse imparted to a test particle by a massive body passing nearby can establish the difference, and it may be possible to carry out this measurement in a laboratory. As a by-product of our computations we obtain a generalization to nonradial motion of the slowing-down effect in a Schwarzschild field.

Original languageEnglish
Pages (from-to)549-555
Number of pages7
JournalInternational Journal of Theoretical Physics
Issue number7
StatePublished - Jul 1978


Dive into the research topics of 'Is active gravitational mass equal to inertial mass?'. Together they form a unique fingerprint.

Cite this