Chapter 18 Gravitational Fields Flashcards
1
Q
What is the gravitational attraction of an object called?
A
Weight
2
Q
How far does a gravitational field extend?
A
Infinitly
3
Q
What is the gravitational force exerted per unit mass?
A
The gravitational field strength g at a point within a gravitational field
4
Q
What is the gravitational field strength equation?
A
gravitational field strength = Gravitational Force per unit mass
5
Q
what is the unit for Gravitational field strength?
A
Newton kg ^-1
6
Q
What is the F = mg the same as
A
the equation of free fall of an object
7
Q
What are the features of a gravitational field lines?
A
- They do not cross
- The arrows show the direction of the force on a mass at that point in the field
- The force is always attractive
8
Q
Where do gravitational field lines star from?
A
The centre of mass
9
Q
Gravitational field strength decrease with what?
A
Distance
10
Q
What is a uniform gravitational field?
A
if the field lines are parallel and equidistant
