Gravitational Force

As a space ship of constant mass moves farther away from Earth, the strength of the gravitational interaction between the Earth and the space craft

• stays the same.

• increases.

• there is not enough information to answer.

• decreases

Complete the following statement: The farther away two planets are the _______ the gravitational force between them.

• more
• same
• dosen't matter
• less

Which of the diagrams shows the least gravitational force?

• I

• II

• III

• IV

If a feather and a hammer are dropped at the same time on the moon, where there is no atmosphere, which one will hit the ground first?

• Neither, there is no gravity on the moon.

• hammer because it has more mass

• feather because it has less mass

• both will hit at the same time, there is no wind resistance

Why do we have a stronger gravitational attraction with Earth than the Sun?

• the sun has a larger mass

• the Earth has a larger mass

• we are closer to center of sun

• we are closer to center of Earth

Mass is the amount of _____ that makes up an object.

• weight
• force
• gravity
• matter

Gravitational force always ____________.

• pulls

• pushes

What is gravitational force?

• It makes objects at rest start moving.
• It makes objects that are moving stop.
• The force of attraction between two objects.
• It pulls you into space.

Which of these best describes why your weight (on Earth) would change on another planet?

• Dehydration effects on different planets change weight.
• In general, the smaller the planet, the greater weight
• Different planets have different gravitational pulls
• Weight does not change, no matter where you are.

A baseball and bat are on the ground.   What is true?

• They attract each other with equal gravitational force.
• There is no gravitational force between them.
• The baseball will float because it's lighter.
• The bat will pull the baseball closer to itself.