Gravitational Fields

Question 1

Define newtons law of gravitation

Answer 1

Any two point masses will attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them

Question 2

What happens to the strength of the gravitational field at larger distance

Answer 2

At a larger distance field lines will cover a larger area so the strength of the field will become weaker

Question 3

Define gravitational field strength

Answer 3

The gravitational field strength is the force per unit of mass

Question 4

What is equation for speed of orbit

Answer 4

V^2 =GM/r

Question 5

What is keplers third law

Answer 5

T^2 proportional to r^3

Question 6

State a feature and use of a geostationary satellite

Answer 6

Has an orbital period of 24h and is used for television broadcasting

Question 7

What do field lines show on gravitational fields

Answer 7

The arrows indicate direction of the field

The spacing between the field lines represents the strength of the gravitational field