Graviaty basics
The value of g is strongest at which part of the Earth?
poles
This happens to a ball thrown upwards if it doesn’t reach escape velocity.
Falls back
John Michell and Pierre Laplace speculated that stars with this property could trap light
very high mass / escape velocity equal to light speed
This instrument is used to measure tiny variations in gg
gravimeter
The gravitational field is called this because energy is not dissipated
conservative field
Earth’s shape is not perfectly spherical due to this reason
Rotation
The formula for escape velocity is this:
v = square root 2GM/r
The radius at which an object becomes a black hole is called this
Schwarzschild radius
Variations in g caused by moving magma can be used to predict this natural hazard
Volcanic eruption
The work done by gravity around a closed loop is equal to this
Zero
Variations in gg can be used to prospect for these valuable resources
Minerals and oils
At infinity, gravitational potential energy has this value
0
According to Einstein, nothing can travel faster than this
speed of light
A gravimeter can detect changes as small as this fraction of g
one ten-millionth
Gravitational potential depends only on this, not the path taken
position (or location in the field)