gravitational fields

Question 1

What is Kepler’s first law?

Answer 1

orbits are eliptical with the sun at one focus and the other focus is unoccupied

Question 2

What is Kepler’s second law?

Answer 2

equal areas are swept in equal times

Question 3

What is Kepler’s third law?

Answer 3

the radius of the orbit cubed is proportional to the time period squared

Question 4

What is the gravitational field strength?

Answer 4

the gravitational force exerted per unit mass on a small object placed at a point within the field

Question 5

Any spherical object can be modelled as

Answer 5

a point mass

Question 6

What is Newton’s law of gravitation?

Answer 6

The force between two point masses is directly proportional to the product of the masses, and inversely proportional to the square of the seperation

Question 7

In order to be geostationary orbit, a satellite must be

Answer 7

in orbit above the equator
rotate in the same direction of the earth’s rotation
have an orbital period of 24 hours