gravity

What does the concept of a field mean?

A region in which a body (mass, + charge or

current) experiences a force

State Newton's law of gravitation

The attractive force between two masses is

directly proportional to the product of the

masses and inversely proportional to the

distance between the two masses squared

What equations would you equate when solving

problems involving orbiting satellites

G m m / r^2 = m v ^2 / r

How would one derive Keplers 3rd law

G m m / r^2 = m v ^2 / r and sub in v = 2 pi r /

T

How would one derive escape velocity

equate energy's 1/2 mv^2 = GmM / r

Define Kepler's 3rd Law

The orbital radius cubed is proportional to the

orbital time period squared