# Answer to Question #9654 in Mechanics | Relativity for kapil

Question #9654
state the relation between mass and inertia.
1
2012-05-22T11:56:46-0400
The inertial mass of an object determines its acceleration in the presence of an applied force. According to Newton&#039;s second law of motion, if a body of fixed mass M is subjected to a force F, its acceleration &alpha; is given by F/M. A body&#039;s mass also determines the degree to which it generates or is affected by
agravitational field. If a first body of mass MA is placed at a distance r from a second body of mass MB, each body experiences an attractive force FG whose magnitude is FG =GMAMB/r2, where G is the universal constant of gravitation, equal to 6.67&times;10&minus;11 N&middot;m2&middot;kg&minus;2. This is sometimes referred to as gravitational mass.[note 1] Repeated experiments since the 17th century have demonstrated that inertial and
gravitational mass are equivalent; since 1915, this observation has been
entailed a priori in the equivalence principle of general relativity.

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