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One Radian
When an object moves in a circle the arc length s=r is then angular displacement.
What is Newton’s Universal Law of Gravity?
Every particle in the universe attracts every other particle with a force that is directly proportional to the product of the masses and inversely proportional to the square of the distance between them
F=G(m1m2/r^2)
What is a revolution?
When an object moves around another object
Ex. It takes the Earth 365 days for a full revolution around the sun.
What is an escape velocity?
The speed an object needs to leave earth
What is the keplers 2nd law of motion?
A line drawn from the sun to any planet will sweep out equal areas in equal times
Angular Speed
The average angular speed, w, of a rotating rigid object is the ratio of the angular displacement to the time interval
Note 
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