Chapter 7 - Gravitation Flashcards
Kepler also found that ________
The planets move faster when they are closer to the sun and slower when they are farther away from the Sun.
Kepler’s First Law
The paths of the planets are ellipses with the Sun at one focus.
Kepler’s Second Law
An imaginary line from the Sun to a planet sweeps equal areas in equal time intervals.
Period
The time it takes for a one revolution of an orbiting body.
Kepler’s Third Law
As the distance b/w the planet and the sun increases, the period of the planet increases as well. Farther planets from the sun have longer periods
Gravitational Force
The force of attraction b/w 2 objects must be proportional to the object’s mass.
Law of Universal Gravitation
Objects attract other objects with a force that is proportional to the product of their masses and inversely proportional to the square of the distance b/w them.
If the mass of a planet near the sun doubles, the force of attraction __________.
Doubles
