09Lecture_13

09Lecture_13 - Lecture 13 Feb 16 2009 Dynamics of Circular...

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0 Lecture 13 Feb. 16, 2009 Dynamics of Circular Motion • Satellites in Circular Orbits • More Circular Motion – Examples
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1 Announcement Having Trouble with Free Body Diagrams? (Someone might have put them on the coming prelim!) Special Coop on FBD Basics 7:30 - 9:00 p.m. Homework Party 701 Clark Hall Wednesday February 18
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2 Lecture 5: Circular motion at constant speed (uniform) a rad v v a rad a rad v a rad = v 2 R Centripetal force: F = m a rad
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3 Gravitation… • Force that holds satellites in orbit: gravitational attraction (Lecture 12) • velocity and orbital period of satellites in circular orbits? F g = Gm 1 m 2 r 2
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4 Example • What is the speed of a satellite at 300 km above the surface of the earth? Assume a circular orbit.
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Solution Circular orbit only Acceleration points into direction of net force by Earth on Satellite (towards center of Earth) Satellite’s velocity does NOT depend on it’s mass! r
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This note was uploaded on 02/25/2009 for the course PHYS 1112 taught by Professor Leclair,a during the Spring '07 term at Cornell.

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09Lecture_13 - Lecture 13 Feb 16 2009 Dynamics of Circular...

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