forces

Gravity is ____.

• a force that attracts objects towards each other

• a force that moves objects away

• a push or pull

What force holds the planets in motion around the sun?

• Magnetic
• Electrical
• Gravitational
• Air Resistance

What does the strength of gravity between two objects depend upon?

• Mass & distance
• Mass & weight
• Gravity & inertia
• Inertia & mass

All objects in the universe have a gravitational attraction to each other. 

• True
• False

What force ultimately slows the roller coaster to a stop?

• Applied
• Normal
• Friction
• Magnetic

An _______ force must act on an object for it to CHANGE it's motion

• balanced
• unbalanced
• gravitational
• electrical

Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 

• That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
• That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
• That Jupiter’s and Earth’s gravitational forces are equal.
• Mass has no effect on the gravitational force between two objects

This type of force resist motion between two surfaces that are pressed together

• contact
• gravity
• friction

If the net force is equal to zero, the forces acting on the object are

• balanced

• unbalanced

Balanced forces do not change the objects speed or 

• direction
• distance 
• time
• mass