“Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.”
The first time I heard that quote was in an introduction to physics in High school at “Lycée Lamine Gueye,” Dakar, Senegal.
I wondered who that Archimedes guy was because, clearly, he was bold.
The secret to that bold statement: the COG or Center Of Gravity.
No, there will be no complicated maths here. Just bare with me!
“In physics, the center of mass of a distribution of mass in space (sometimes referred to as the balance point) is the unique point where the weighted relative position of the distributed mass sums to zero.”
Let’s assume, in the universe of this article, that the center of mass is the same as the COG. It is an excellent approximation of our reality at ground level on Earth.
Let’s take a simple example. It’s Sunday, before 2019 (You will understand why soon.) You want to sleep over, and Bryan, your young son, is turning you crazy. As a last resort, you decide to get him some fresh air.
Now you are heading to the playground with no mask. Because 2018 is a Covid-19-free world. You arrive at the playground, and nobody is there.
You decide to put Bryan on one side of the children’s swing, and you sit on the opposite side. Yet you forget that you weigh 10 times more than your son Bryan, not because of confinement. Remember 2018.
And by the time your ass hits the saddle of the swing, Bryan is on a launchpad for the moon.
And this is where you tell him: Son, Sky is not the limit, I hope!
That is the magic behind the COG. You are at the same distance as Bryan.
Your weight is applied to each of your COG.
Let’s assume that your belly button is your respective COG. But because you weigh 10 times more than him, your sitting momentum is 10 times more…