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Flashcards in Gravitation Deck (11):
1

What is the equation for Newton's Law of Gravitation?

Fg= GM1M2/R^2

2

What is Newton's Law of Gravitation also referred to as?

An inverse squared law; ie. If the radius is doubled, the force would be 1/4

3

What is the acceleration of a mass near earth's surface? (Me= earth's mass, Re= earth's radius)

a=GMe/Re^2
-9.8 m/s^2

4

What is the acceleration due to gravity independent to?

The mass of a falling object

5

What is the equation for gravitational potential energy? (Me= earth's mass, Re= earth's radius)

Pe=-GM1Me/Re

6

What is the equation for escape velocity? (Me= earth's mass, Re= earth's radius)

Ke=Pe
1/2mv^2=-GM1Me/Re
v=sqrt(2GMe/Re)

7

What is Escape Velocity?

The velocity of an object when it leaves earth's surface

8

What is Orbital Velocity?

The velocity of an object in circular orbit with earth

9

What is the equation for orbital velocity? (Me= earth's mass, Re= earth's radius)

Fc=Pe
mv^2/R=-GM1Me/Re
v=sqrt(GMe/Re)

10

What is both escape and orbital velocity dependent on?

The earth's mass, not the mass of the object

11

What is Newton's Law of Gravitation?

There is always a force of attraction between any two masses and the magnitude of this force is directly proportional to the product of the masses and inversely proportional to the square of the distance between them