gravitational fields Flashcards
1
Q
what is a gravitational field line
A
If an object of small mass is in free to fall due to gravity, the path that it will
2
Q
what is the gravitational field strength
A
is
the force per unit mass on a small test mass m placed in the field.
3
Q
how can we define gravitational potential energy
A
the energy of an object due to its position in a gravitational field.
4
Q
equipotentials
A
surfaces of constant potential.
5
Q
The potential gradient at a particular point in a gravitational field is
A
the change in potential per metre.
6
Q
Newton’s Law of Gravitation assumes that the gravitational force between any two point objects is:
A
always an attractive force
proportional to the mass of each object
proportional to 1/r2, where r is the distance
between the two objects
