Discovered this note to myself from Mark’s senior year in high school.
Our mornings are pretty predictable. Mark gets up, gets ready for the day and then works on the computer till 8:30 when he goes for his run. While he is running, the other kids use the computer for math and a few other things. When Mark gets back, he is usually upstairs by the time the others are done.
I went downstairs and noticed that his door was still closed when the rest of the kids were done. I asked him what he was doing. He replied “physics”. Knowing he often works in his room, I asked what he was learning today. He replied, “A body at rest tends to stay at rest”. I laughed and told him to come upstairs, thus completing the rest of Newton’s first law of motion which states a body at rest tends to stay at rest until an external force acts upon it.