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GENERAL RELATIVITY Equivalence Principle 1.Equivalence principle 2.Free Fall.

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Presentation on theme: "GENERAL RELATIVITY Equivalence Principle 1.Equivalence principle 2.Free Fall."— Presentation transcript:

1 GENERAL RELATIVITY Equivalence Principle 1.Equivalence principle 2.Free Fall

2 General Relativity extends first postulate Laws of Physics are same for observers in any frame of reference, including non-inertial * *accelerating, which can be felt without reference to other frames Stepping stone to implement idea

3 Effect of acceleration = effect of gravity when stationary Small freely falling frame = local inertial reference frame General Relativity = Model of gravity Inside Aircraft freely fallingfreely falling dog

4 Mass All objects free fall with same acceleration (Galileo)Galileo Inertial mass = Gravitational mass Resistance to acceleration (F=ma) Source of gravity force WHY?

5 There is no force of gravity! In free fall, no forces are felt Earth’s surface is non-inertial frame Projectiles are freely moving yet follow a curved path relative to Earth’s surface: Not due to gravity force Due to “acceleration” of Earth’s surface

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