Chapter 38A -- Relativity

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Example 3: The rest mass of an electron is 9.1 x 10 -31 kg. . What is the relativistic mass if its velocity is 0.8c ? m m 0 1 v c 2 2 - 0.8c m o = 9.1 x 10 -31 kg m -31 -31 9.1 x 10 kg 9.1 x 10 kg 1 (0.6 c) c 2 2 0.36 m = 15.2 x 10 -31 kg The mass has increased by 67% !
Mass and Energy Prior to the theory of relativity, scientists considered mass and energy as separate quantities, each of which must be conserved. Now mass and energy must be considered as the same quantity. We may express the mass of a baseball in joules or its energy in kilograms! ! The motion adds to the mass-energy.
Page 1 and 2: Chapter 38A - Relativity A PowerPoi
Page 3 and 4: Special Relativity Einstein’s Spe
Page 5 and 6: No Preferred Frame of Reference Wha
Page 7 and 8: Platform as Reference West Frame of
Page 9 and 10: Velocity of Light (Cont.) Platform
Page 11 and 12: Time Measurements Since our measure
Page 13 and 14: Relative Time (Cont.) d c 2d t 0 t
Page 15 and 16: Proper Time The key to applying the
Page 17 and 18: The Twin Paradox Two twins are on E
Page 19 and 20: Length Contraction Since time is af
Page 21 and 22: Foreshortening of Objects Note that
Page 23: Relativistic Mass If momentum is to
Page 27 and 28: Mass and Energy (Cont.) The convers
Page 29 and 30: Example 4: What is the kinetic ener
Page 31 and 32: Summary (Cont.) Relativistic time:
Page 33: CONCLUSION: Chapter 38A Relativity

Chapter 38A -- Relativity

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