lecture 37 - intro to relativity

# lecture 37 - intro to relativity - Announcements Prayer...

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Announcements 4/1/11 Prayer Labs 9, 10 due tomorrow Exam 3 starts tomorrow “So, Dr. Colton, what’s on the exam?”

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Reading Quiz From my point of view, objects which experience  no force don’t accelerate.  What type of  reference frame am I in? a. An “Einsteinian” reference frame b. An “enlightened” reference frame c. An “inertial” reference frame d. A “null” reference frame e. A “typical” reference frame
Fictitious forces Toss a ball straight up, in car. Slam on the  brakes. What happens? Throw a ball to a friend on a merry-go-round  (as it’s spinning). What path does the ball  take? Reference frames where Newton’s Laws  apply: “inertial frames”

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Galilean Relativity Galilean Relativity Credit: this slide and next one from Dr. Durfee v 1 = 80 mph v 2 = 100 mph
Galilean Relativity Galilean Relativity v 1 = 0 mph v 2 = 20 mph Reference frame moving with car 1

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HW 37-3 A 1 kg object (m 1 ) collides with a 2 kg object (m 2 ) on  a frictionless surface. Before the collision, m 1  is  traveling at 9 m/s to the right and m 2  is at rest with  respect to the ground. The collision is elastic and m 1   bounces straight back to the left.  a. Figure out the final velocities of both masses after
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lecture 37 - intro to relativity - Announcements Prayer...

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