17 - gravitational fields Flashcards

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1
Q

Define gravitational field

A

a region in space where a mass experiences a gravitational force

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2
Q

Define centre of mass

A

the point at which we consider the total mass of the object to be concentrated

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3
Q

Define Newton’s law of gravitation

A

any two point masses attract each other with a force that is directly proportional to the product of their masses and inversly proportional to the square of their seperation

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4
Q

Define gravitational field strength

A

the gravitational force exerted per unit mass on a small object placed at that point

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5
Q

Define gravitational potential

A

at a point is the work done per unit mass in bringing a point mass from infinity to that point

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6
Q

Define orbital period

A

the time taken by an object to complete one orbit

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7
Q

Define geostationary orbit

A

an orbit of a satellite such that the satellite remains directly above the same point of the earth at all times

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