The Proportionality of the Inertial and Gravitational mass

In physics, mass can be defined in two ways as inertial and gravitational. The inertial mass of a body determines the acceleration given by an applied force (Newton's second law). The gravitational mass of the body determines the force it experiences due to the gravitational attraction of another body.

In order to examine this phenomenon, he used his sensitive torsion balance. He examined the state of equilibrium of the balance by attaching masses of different composition to each end of the arm of the balance. If the quantity of gravitational force depended on the composition of the mass, when placing bodies of different composition on to the balance, the state of equilibrium should change in each case. This phenomenon did not occur.

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