11A.1 Gravitational Forces Flashcards
what is accrete
to grow slowly by attracting and joining with many small pieces of rock and dust, due to the force of gravity
massive particles will generate a
radial gravitational field
what is a gravitational field
a region of spacetime which is curved. This curvature will cause particles to experience an accelerating force
what is the theory about formation of galaxies, stars and planets.
after the big bang the masses spread across the universe accrete
what is the equation for the strength of the gravitational force
F = mg
what is the equation that shows the force between two masses, which are separated by distance r
F = Gm1m2 / r^2
what is uniform equations
acceleration that is always the same value; constant acceleration
why is it difficult to calculate the time taken for two planets to meet each other
the acceleration is inversely proportional to the square of distance between them. Therefore, the acceleration is constantly increasing as they got closer to each other, and our usual equations of motion requires uniform acceleration
what is an orbit
the curved path that a planet, satellite or similar object takes around another object in space
calculations about the properties of satellites usually need us to
put the gravitational force expression equal to the centripetal force expression with V= 2pir/T
weighting the earth
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