Newton's Laws of Motion

A bug gets smashed by a windshield. Did the bug or the windshield exert more force?

• hit with same force

• windshield more force

• bug more force

You hit the wall with a stick. What is the action/reaction pair?

• stick hits wall / wall hits stick

• you swing stick / stick hits wall

• stick hits wall / hand hurts

A fish is swimming in the ocean. Describe the action/reaction pair involved.

• fin pushes backward, water pushes forward

• fin pushes forward, water pushes backward

A heavy football player runs into a light football player. Which player exerts the most force?

• no difference

• sighter

• heavier

As distance between objects increases, what happens to the forces involved?

• becomes less

• becomes more

• remains the same

For every action force there is an _________ and ________ reaction force.

• equal / opposite

• opposite / equal

• action / reaction

• push / pull

If a person pushes a cart forward with 25 N of force, what is the reaction force?

• 25 N backward

• 50 N backward

• 25 N forward

• 50 N forward

In every action/reaction pair, how many objects are involved?

• two

• one

• three

• zero

In physics, what word is used for the amount or size of something?

• magnitude

• vector

• scalar

• quantity

Per Newton’s third law, the motion of the two objects must be the same, just opposite.

• FALSE

• TRUE