PHYS 1501Q Lecture Notes - Lecture 11: International System Of Units, Low Earth Orbit, Ellipse

• School: UConn
• Department: Physics
• Course: PHYS 1501Q
• Professor: Soroush Khosravi Dehaghi, Robert McCutcheon

Document Summary

Physics 1501q - lecture 11 - kepler"s laws 9/19/18. Key (in si units): t = time (s) x = distance (m) v = velocity (m/s) a = acceleration (m/s 2 ) = change in g = gravity = 9. 81 m/s 2 m = mass (kg) 1st law: planets in the solar system follow elliptical orbits, with the sun at one focus of the ellipse. = radius of minor axis a = radius of major axis e 0. 017 for the earth"s orbit around the sun. Earth"s tilt is the reason for different seasons. 2nd law: as a planet moves in its elliptical orbit, it sweeps out an equal amount of area in an equal amount of time. 1 (source: slide 9 of 9/19 lecture notes https://lms. uconn. edu/bbcswebdav/pid-2535964-dt-content-rid-38347344_1/courses/1188-uco. 3rd law: the period t of a planet is related to its mean distance from the sun, r, according to: