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The minimum speed required to escape from a gravitational field.
Gravitational Potential Energy
The work done in bringing a small test charge from a point of zero potential to a point in the field
Magnetic Flux
The product of the magnetic field strength and the area normal to the field.
gravitational field
a region of space in which an object experiences a force due to its mass
PE
-(GMm)/r
KE
(GMm)/(2r)
Total energy
-(GMm)/(2r)
gravitational potential difference
the work done in moving a mass between two points in a gravitational field
polar orbit
satellites orbit over the earth’s poles in one plane, intersecting the earth’s center, with earth rotating underneath
geosynchronous orbit
satellites stay in the same area of sky and typically follow a figure-of-eight orbit
geostationary orbit
satellites orbit above the plane of the equator at the same rotational speed as the Earth
magnetic field
exists at a point where a magnetic force acts on a magnetic pole placed at that point