Class 10 - Dynamics Newtons First Law Physics 1301 Fall...

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1 Dynamics: Newton’s First Law Physics 1301, Fall 2011: Class 10 Monday, September 26, 2011
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2 Objectives: Monday, September 26 Dynamics: Why motion occurs Newton’s Laws Newton’s First Law: mass, inertia
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3 Demonstrations 1f10.10 Inertia Balance 1f10.20 Inertia Bongs 1f20.10 Inertia Balls 1f20.11 Bowling ball inertia
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Neutrinos 4
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Neutrinos and the Speed of Light On Friday, the European Organization for Nuclear Research announced an observation of neutrinos travelling faster than the speed of light Presumably, velocities greater than c are forbidden by Einstein’s theory of Special Relativity The claimed effect in 730 km is ~60±10 ns. Such a result requires timing accuracy of ~5 ns and distance accuracy of ~1 m. 5
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Neutrino Beams There are three neutrino beams in the world Fermilab to Soudan MN: 735 km--OPERA CERN to Gran Sasso, Italy: 730 km--MINOS Tsukuba to Kamioka, Japan: 270 km--SuperK 6
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Why Special Relativity? Albert Einstein did not just make up Special Relativity in 1905 Special Relativity derives from our understanding of electricity and magnetism Without Special Relativity, electromagnetism doesn’t make any sense, so it is unlikely that Special Relativity is totally wrong 7 ++++++++++++++++++++ ++++++++++++++++++++
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Mass in Special Relativity According to Special Relativity, mass (and therefore inertia) are variable.
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