Chapter 2: Forces and Motion

Front

What happens when the forces on an object are equal in strength and opposite in direction?

Back

The motion of the object does not change.

Front

What occurs when an object accelerates?

Back

Its speed or direction changes.

Front

What does every force have besides strength or magnitude?

Back

Direction.

Front

Which surface will slow the movement of a ball the most when rolled with the same force?

Back

Grassy Field.

Front

What type of shadows do trees form when the sun is low in the sky early in the morning?

Back

Long shadows.

Front

What is force?

Back

A push or pull on an object.

Front

What is motion?

Back

The change in position of an object over time.

Front

What is acceleration?

Back

The rate at which an object changes its velocity.

Front

What is friction?

Back

A force that opposes the motion of an object.

Front

What is gravity?

Back

A force that pulls objects toward each other, especially toward the Earth.