Lecture 6

Lecture 6 - Wednesday, January 30, 2008 Today: Hand in...

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Wednesday, January 30, 2008 Today : Hand in Homework #2 Pickup Assignment #3 Pickup graded Homework #1 Solutions to Homework #1 on the web Finish Chapter 5 Universal Gravitation Gravity and Weight Tides Start Chapter 6 Work, Energy and Harmonic Motion
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End of Last Class - Concept Question Consider two people on opposite sides of a rotating merry-go-round. One of them throws a ball toward the other. In which frame of reference is the path of the ball straight when viewed from above: A. the frame of the rotating merry-go-round B. the frame of the Earth C. (a) and (b)—although the paths appear to curve D. neither; because it’s thrown while in circular motion, the ball travels along a curved path.
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End of Last Class - Concept Question Consider two people on opposite sides of a rotating merry-go-round. One of them throws a ball toward the other. In which frame of reference is the path of the ball straight when viewed from above: A. the frame of the rotating merry-go-round B. the frame of the Earth C. (a) and (b)—although the paths appear to curve D. neither; because it’s thrown while in circular motion, the ball travels along a curved path. A B. C D E 21% 69% 0% 7% 2%
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Planetary Motion - More History Laser disk (program 25, units 6 - 12) Copernicus: all planets move in sky about the sun How do they go around the sun? Circle? Curve? and how fast? Tycho Brahe , 1546-1601, Danish Astronomer Observed and recorded positions of planets in the sky vs. time Endeavored to distinguish theories! Beginning of the endeavor to understand nature
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Lecture 6 - Wednesday, January 30, 2008 Today: Hand in...

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