Fields Flashcards
1
Q
What can feel gravity?
A
Anything with mass
2
Q
What is F?
A
Gravitational force
3
Q
What is g?
A
The force per kilogram of mass exerted by a gravitational field on an object.
4
Q
What is V?
A
The work done per kilogram against gravitational force to move an object from infinity to a given point.
5
Q
What is gravitational potential difference?
A
The energy needed to move one kilogram of mass between two points.
6
Q
What is an equipotential?
A
Surfaces on which the potential is constant - perpendicular to field lines. The gravitational potential difference is zero when moving along an equipotential, so the work done is also zero.
7
Q
What is Kepler’s 3rd Law?
A
The square of the orbital period t is directly proportional to the cube of the radius r.
8
Q
A
