Gravitational Fields Flashcards
1
Q
Strength of gravitational field definition
A
Force per unit mass acting on a small test mass in a field
2
Q
Gravitational field strength / gravitational force / mass
A
g = F/m
3
Q
Gravitational potential definition
A
Work done per unit mass on a small test mass moved from infinity up to that point
4
Q
Gravitational potential equation
A
V = - GM/r
5
Q
gravitational field strength equation
A
g = GM/r^2
6
Q
Gravitational force / Mass / Radius equation
A
F = (G * M1 * M2)/r^2
7
Q
Change in GPE equation
A
change in E(gpe) = m * change in V
8
Q
Escape velocity definition
A
Minimum velocity an object must be given to escape from the planet when projected vertically
9
Q
Escape velocity equations
A
V = sq root (2GM/R) V = sq root (2gR)
10
Q
Total energy of satellite equation
A
E = - 1/2 (GMm/r)
11
Q
Big G magnitude + units
A
6.67e-11 N m^2 kg^-2
