1st Law
The time it takes a comet to complete one revolution is called
period
The speed of the planets about the sun depends on...?
their distance from the sun
Planets move at the same speed as they orbit the Sun.
True or False
False
Planets change speeds as they orbit the Sun
Newton's Law of Universal Gravitation states that force of gravity is directly proportional to this.
What is the product of the objects' masses?
Kepler's 1st Law states that all planets orbit the sun in a shape called an?
Ellipse
A planet sweeps out in an equal area in equal time
True or False
True
What does T^2=R^3 mean?
T=Obtical period
R= mean distance from the sun
The gravitational force does this when two objects reduce their distance by half.
What is quadruple?
The moon is the focus
True or false
False
The sun is the focus
Kepler's second law states that equal areas are covered in equal amounts of time as an object...?
orbits the sun
What is an AU (astronomical unit)?
Unit used most to describe distances in the solar system
Newton's Law of Universal Gravitation states that the force of gravity is inversely proportional to this
What is the squared distance between two objects?
Saturn's year is longer than Earth's because...?
Saturn has a longer major axis
Kepler's second law is about?
A vector joining any planet sweeps equal area in equal time
Kepler's Third Law of Planetary Motion describes the relationship between the planet's...?
a- Time it takes to orbit the Sun and its distance from the Sun
b- Mass and distance from the Sun
A
The weight of a person who weighs 800 N on Earth and goes to a planet 3x the mass and 2x the radius of Earth.
What is 600 N?
It takes Pluto a longer time to orbit the sun than the Earth does because...?
Goes much slower, has much further to go
Which of the following is correct?
A- Planets move slower when they are closer to the sun, faster when they are farther away.
B- Planets move faster when they are closer to the sun, slower when they are farther away.
B
What is the Third Law's ratio?
T^2/r^3
What are the units for gravitational force compared to the units of gravitational field?
Newtons vs Newtons per KG