Gravitation

According to Newton's law of gravitation, the Earth and the Moon are gravitationally attracted to each other. The more massive Earth attracts the Moon with...

• a stronger force than the Moon attracts the Earth.

• a weaker force than the Moon attracts the Earth.

• the same force as the Moon attracts the Earth.

• a force that is sometimes stronger and other times weaker than the Moon attracts the Earth.

The picture shows three objects gravitationally interacting with each other. Which object exerts the greatest force on object B?

• Object A

• Object C

• A and C exert an equal force on B

• Cannot be determined

The gravitational force in the previous interaction was 20 N. Determine the gravitational force in the new situation where the second mass is doubled.

• 10 N

• 20 N

• 40 N

• 80 N

The picture shows the gravitational field in the space surrounding the Earth. What is creating this gravitational field?

• The gravitational force.

• The mass of the Earth.

• The distance of the Earth.

• The universal gravitational constant.

Kepler's Second Law states

• objects attract other objects with a force that is directly proportional to the product of their masses

• the square of the ratio of the periods of any two planets revolving around the Sun is equal to the cube of the ratio of their average distance from the Sun

• An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time.

• Planets move about the Sun in an elliptical orbit with the Sun at one of the foci.

Kepler's 2nd Law deals with 

• the shape of the planets' orbits
• the speed/area the planet travels 
• the length of time it takes the planet to orbit the sun

Kepler's first law states that the orbits of the planets are oval in shape or 

• ellipses
• perfect circles

The path a planet travels around the sun is called its 

• orbit
• ellipse
• barycenter
• precession

What is inertia?

• amount of atoms
• amount of gravitational pull
• the size
• resistance to a change in motion

In which location would you weight the least?

• Venus
• Earth
• Jupiter
• Moon