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level: Gravitational fields

Questions and Answers List

Question	Answer
Work done	M x Change in V (gravitational potential)
What is the force proportional to. two equations	m1 x m2 1/r^2 r = distance between the two masses
What is the force with the gravitational constant, also known as the inverse square law	G x m1 x m2 / r^2
What is the gravitational field constant	6.67x10^-11
Gravitational field strength with F and m	g = F / m
Gravitational field strength with G m and r	g = G x m / r^2
What are the three types of satellite	Geostationary, Geosynchronous, polar orbits
What are the characteristics of a geostationary satellite	Above equator Same period and direction as earth spin Stays above one point of the earth
What are the characteristics of a geosynchronous satellite	Same period as earths spin In same place every 24 hours
What are the characteristics of a polar orbit satellite	Goes pole to pole Goes low and fast Covers lots of earths surface Used for weather and spying
Gravitational field energy	GPE x m Gravitational potential energy x mass
Gravitational potential energy	Vg = Gm / r
Work done	m x v x g