Gravitation (3) Flashcards
1
Q
Gravitational field
A
a region in space in which a massive object experiences a gravitational force.
2
Q
Field strength
A
the strength of the gravitational field measured in Nkg-1. Field lines represent the direction and strength of the field.
3
Q
Gravitational potential difference
A
the gravitational potential energy difference per kilogram. Gravitational potential, and potential difference, have units of Jkg-1.
4
Q
Gravitational field
A
a gravitational field g is linked to the gravitational potential gradient by the equation g=-∆V/∆h
5
Q
Escape velocity
A
the minimum velocity an object must have at the surface of a planet to escape the pull of gravity using its own kinetic energy.
