8th Grade Unit 3: Newton's Laws Post Test

A change in motion or velocity

Measures the amount of matter of an object.

The tendency of an object to keep its same motion.

A push or pull on an object.

The speed of an object in a given direction.

Unbalanced for that opposes motion between two surfaces.

Acceleration depends on what two things?

• force and friction
• mass and weight
• force and mass
• force and weight

The two forces of a force pair are called the ___ force and the ___ force.

• action; reaction
• mass; reaction
• mass; acceleration
• increasing; decreasing

Friction always acts ___ the direction of motion of an object.

• opposite to
• in the same direction as
• perpendicular to

A change in motion is described by

• inertia
• speed
• net force
• acceleration