Relative distances in space - planetary and stellar mean distances
Gravity as a centripetal force
Ptolemeic and Copernican systems in a historical perspective
Brahe and Kepler's contribution to planetary motion
Tuesday, January 23
Wednesday, January 24
Thurday, January 25
Friday, January 26
Monday, January 29
Kepler's three laws of planetary motion
1st law demonstration with film cans on white board
2nd law demonstration with equal area/equal time law
3rd law example: Orbital period of another planet
Derivation of time and radius laws
Some other Kepler's Third Law examples
Geosynchronous satellite orbital radius and its comparison to the orbital altitude
Discovering exoplanets: A planet is found to orbit another star with a period of 4.5 years at a distance of 18 AU. We find that another planet orbits at a radius of 9 AU. What is that planet's orbital period?
P. 195, 41-44 due
Go over problems 41-44 together
Newton's perspective on orbits as projectile motion
Intro. to Universal Law of Gravitation
Some more Universal Gravitation examples
Force between a person and a stapler 2 m apart
Force between a person and the Earth
Force between the Earth and Sun
Intro. to Gravity Lab
P. 195, 32-37 due
Hand in problems
Collect gravity lab data
Tuesday, January 30
Wednesday, January 31
Thursday, February 1
Friday, February 2
Monday, February 5 - 2 hour delay
Tuesday, February 6
Calculating g as an acceleration due to gravity and as a field strength
velocity in orbit as ratio of circumference to period AND from Fc=Fg
Work on gravity lab and problems
Gravity Lab due
Newton's Version of Kepler's Third Law
Examples of Newton's Version of Kepler's Third Law
Return/review problems and lab
More orbital example problems
P. 196; 50-54 due
Go over problems together in class
Orbital Problems due
Hand out printed solutions instead of going over on the board because of a shortened class period.