Fun fact: I was taking a test one day and for question 9 we were talking about relative motion. It said "Greg, Henry and Matthew are holding a door closed to keep the zombies out. How many newtons of force are they using?"
They had their separate newtons of force labelled there.
So I answered "49N" and got it right, and at the bottom of the page I drew a peashooter.
I got bonus points from my teacher for that one.
