Kepler's First Law of Gravitation
Kepler's Second Law of Gravitation
Kepler's Third Law of Gravitation
Newton's Law of Universal Gravitation
Random
100
What is another name for Kepler's First Law?
Law of Orbits
100
What is another name for Kepler's Second Law?
Law of Areas
100
What is another name for Kepler's Third Law?
Law of Periods
100
What would happen if you shot a cannon at the top of a hill?
The ball would follow the Earth's curvature before falling down.
100
What does (r) symbolize in Newton's Law of Universal Gravitation?
Distance between centers of mass.
200
What is the shape of the planet's orbit according to Kepler's First Law?
Ellipse
200
When does a planet move the fastest in its orbit?
The perihelion
200
What happens to the orbital speed of the planets as their average distance from the sun increases?
The outer planets travel much slower than inner planets.
200
What would happen if you were to shoot a cannon in space?
Since there is no air-resistance the ball would continuously go around the Earth forever.
200
Whose observations did Kepler use to make his three laws?
Tycho Brahe
300
Which planet has the least eccentric orbit?
Venus
300
When does a planet move the slowest in its orbit?
The aphelion
300
What does this symbol mean:
Proportion
300
FILL IN THE BLANK: When the mass of an object ... the force of gravity acting on that object ...
increases, increases or decreases, decrease
300
Which planet did Brahe task Kepler of understanding its orbit?
Mars
400
State Kepler's First Law
The orbit of each planet around the sun is an ellipse with the sun at one focus.
400
TRUE or FALSE: Planets move equal distances in equal time periods.
FALSE
400
State Kepler's Third Law Equation
400
State Newton's Law of Universal Gravitation
All objects in the universe pull on each other with a force determined by the mass of the objects and their distance apart.
400
Who was the first person to point out that heavy and light objects fall toward the earth at the same rate?
Galileo Galilei
500
What is Mercury's eccentricity?
0.206
500
State Kepler's Second Law
The imaginary line joining a planet and the sun sweeps equal areas of space during equal time intervals as the planet orbits.
500
State Kepler's Third Law
The time it takes for a planet to orbit the sun is proportional to its average distance from the sun.
500
What is the formula for Newton's Law of Universal Gravitation?
BONUS: There is sometimes a negative sign before the G in this law. Think why?
Bonus Ans: The gravitational force is always attracting, which means that objects are drawn toward one another, as shown by the minus sign that is occasionally placed before G.
500
How many Earth days does it take for Mercury to complete its orbit?
88