Gravitational Fields

Question 1

State Newtons law of gravitation

Answer 1

any two point masses attract eachother with a gravitational force that is directly proportional to the product of their masses and inversely proportional to the square of their separation

Question 2

What is keplers 3rd law

Answer 2

relationship between orbital time period and orbital radius is given by T^2 ,,, r^3

Question 3

Define a geostationary orbit

Answer 3

A satellite with a geostationary orbit around a planet will remain vertically above the same point on the equator of that planet at all times

Question 4

Define a low polar orbit

Answer 4

A satellite in a low polar orbit passes above the north and south poles during each complete orbit

Question 5

Define gravitational potential

Answer 5

the work done per unit mass to move a mass from infinity to that point

Question 6

Define escape velocity

Answer 6

the minimum velocity required at the surface of a planet to escape its gravitational pull using its own kinetic energy