Balancing Forces: Chapter 4 Quiz

What makes the floating train start to rise off of the tracks?

• Repelling magnetic forces between a magnet in the train and one in the tracks.

• Attracting magnetic forces between a magnet in the train and one in the tracks.

What makes the floating train fall back down onto the tracks?

• Repelling magnetic force between a magnet in the train and one in the tracks.

• Gravity, an attracting force between the train and Earth.

Two forces can be exerted on an object at the same time.

• True

• False

A ________________ is when multiple forces of equal strength act on an object.

• pattern
• design
• balanced force
• magnetic force

A __________________________ happens when multiple forces of unequal strength act on an object.

• touching force
• unbalanced force
• magnetic force
• balanced force

When forces exerted on an object are balanced, the objects...

• movement changes.

• movement does not change.

When something is not changing, Scientists say that it is __________.

• non-stable
• stable
• growing

What are these two men creating?

• They are creating a balanced force, which will result in the couch moving.

• They are creating an unbalanced force, which will result in the couch moving.

• They are creating a magnetic force, which will result in the couch moving.

• They are creating a pull, which results in the couch moving.

Which kind of force is happening here?

• balanced force

• magnetic force

• unbalanced force

• non-touching force

The table in this picture pushes up on the book while gravity pulls it down. The two forces have equal magnitude, but work in opposing directions; They are ...

• balanced forces

• magnetic forces

• unbalanced forces

• non-touching forces