Confirmed to high precision by Hungarian physicist Roland E?tv?s, this principle dates back to Galileo's observation that the period of a pendulum is independent of its mass.  
Confirmed to high precision by Hungarian physicist Roland E?tv?s, this principle dates back to Galileo's observation that the period of a pendulum is independent of its mass.  Although it does not apply to rotating systems or to systems in which the gravitational field varies considerably, it was the basis for predictions of such phenomena as the gravitational red shift.  FTP, name this principle important in general relativity which maintains that inertial mass and gravitational mass are equivalent.
Confirmed to high precision by Hungarian physicist Roland E?tv?s, this principle dates back to Galileo's observation that the period of a pendulum is independent of its mass.  
Principle of Equivalence