Answer: See explanation for answer!
Explanation:
Newton's 3rd law of motion states that for every action there is an equal and opposite reaction.
Example: If you were to sit on a scooter and push off a wall you would push in, and you would feel the same force that you pushed.
You would apply the same amount of force (80 newtons) to lifting the box because it explains the 3rd law. If it weighs 80 newtons, you are applying 80 newtons to lift it up.
