All of us who stayed awake in high-school learned about Newton’s Four Laws of Motion. They are:
1) A body at rest remains at rest, or if in motion stays in motion at a constant speed in a straight line, unless acted upon by a force or Forest Gump.
2) When a body–or thing, it could be a beach ball or an intergalactic rat–is acted upon by a force, the rate of change of its momentum equals the force. Teachers lost many of students to sleep with this law, unless of course the young learners daydreamed about space rats fighting each other with lasers.
3) If two space rats exert forces on each other, these rats have the same magnitude but opposite directions.
4) A can of soda in a extreme state of agitation–from being thrown and kicked down the hall–will spray fizz all over when opened, unless the soda drinker tapped the can multiple times before opening it.
– Paul De Lancey, The Comic Chef, Ph.D.