Newton's 3rd Law and Net Force Practice

What does Newton's 3rd Law state?

• An object at rest remains at rest until acted on by an unbalanced force.
• The tendency of an object to resist a change in motion.
• For every action there is an equal and opposite reaction.

The action force on an object is equal to what?

• the reaction inertia on an object
• the action inertia on an object
• the reaction force on an object

ACTION FORCE: The foot pushing on the ground.

• REACTION FORCE: The ground pushing on the foot.
• REACTION FORCE: The skateboard moving forward
• REACTION FORCE: The inertia of the skateboard moves.
• REACTION FORCE: The foot is only pushing on the ground.

ACTION FORCE: The balloon pushes air down.

• REACTION FORCE: The air pushes the balloon up.
• REACTION FORCE: The inertia of the balloon moves.
• REACTION FORCE: The air is only pushing out of the balloon.
• REACTION FORCE: The air moves out of the balloon.

ACTION FORCE: The bowling ball pushing the pins.

• REACTION FORCE: The pins fall down.
• REACTION FORCE: The pins pushing on the bowling ball.
• REACTION FORCE: The bowling ball moves forward.
• REACTION FORCE: The inertia of the bowling ball changes.

ACTION FORCE: The rocket gas pushing down.

• REACTION FORCE: The rocket moving up.
• REACTION FORCE: The rockets inertia stays the same.
• REACTION FORCE: The gas is only pushing on the ground.
• REACTION FORCE: The ground shakes.

ACTION FORCE: The hands pushing the law mower.

• REACTION FORCE: The inertia of the lawn mower moving forward.
• REACTION FORCE: The grass being cut.
• REACTION FORCE: The lawn mower pushing on the hands
• REACTION FORCE: The hands are only pushing the lawn mower.

ACTION FORCE: The feet pushing down on the diving board.

• REACTION FORCE: The inertia of the man is at rest
• REACTION FORCE: The diving board moving down.
• REACTION FORCE: The man jumps off the diving board.
• REACTION FORCE: The diving board pushing up on the feet.

ACTION FORCE: The golf club hitting the golf ball.

• REACTION FORCE: The golf club is only hitting the golf ball
• REACTION FORCE: The inertia of the ball moves forward.
• REACTION FORCE: The golf ball moves.
• REACTION FORCE: The golf ball hits the golf club.

ACTION FORCE: The hammer hitting the nail.

• REACTION FORCE: The nail moves into the wood.
• REACTION FORCE: The nail hits the hammer.
• REACTION FORCE: The nail moves down.
• REACTION FORCE: The inertia of the nail changes.