2.3 Newton's 3rd Law

Newton’s law states that for every action, there is an ________ reaction.

• unequal and opposite

• equal and similar

• stronger and opposite

• equal and opposite

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

• False

• True

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

• The cannon moving forward

• The cannon moving backwards

• The cannonball moving backwards

• The cannonball moving forward

Action reaction forces never cancel each other out because

• They act on different objects.

• They act on the same objects

• They do not act on objects.

How is this an example of Newton’s Third law?

• Only the ball is using the head

• They are both exerting an equal force on each other

• Only the head is pushing the ball

If two people with the same mass collide, they experience the same amount of force.

• True

• False

Action-reaction pairs can cause a change in motion.

• True

• False

When the person pushes the ground with their foot, the equal and opposite reaction force is

• the ground pushing back on their foot

• when they start to move forward

Force always come in________

• waves

• triplets

• pairs

The forces in a force pair are in _______ direction

• opposite

• same