Gravity Flashcards
1
Q
Force of Gravity
A
F_g = GMm/r^2
2
Q
Gravitational Acceleration
A
g = GM/r^2
3
Q
Gravitational Potential Energy
A
U = -GMm/r
4
Q
Escape Velocity
A
v = sqrt(2GM/r)
5
Q
Kepler’s Laws
A
1) Two bodies orbit each other elliptically
2) Equal areas in equal times
3) T^2 = (4(pi^2)/GM’) a^3, where a is the semi major axis, M’ is the sum of the masses
6
Q
Energy of a circular orbit
A
-GMm/2a
7
Q
Vis-Viva Equation
A
v = sqrt(GM(2/r - 1/a)), r is the distance between the centres of mass, a is the semi major axis
