All the technology we rely on, from cars to smartphones, was designed using physics. You don’t need to know science to use these things. However, a balanced human being should understand at least some important concepts. in music, art, history, and economics. Robert Heinlein said it all enough time for love:
“Humans change diapers, plan invasions, slaughter pigs, slaughter ships, design buildings, write sonnets, balance accounts, build walls, set bones, and give dying orders. You should be able to give orders, cooperate, act independently, solve equations, analyze new problems, analyze pitch fertilizers, program computers, cook delicious meals, and be efficient. fight and die bravely. Specialization is for insects.”
So for non-insects, here are my top 5 physical equations you should know.
1. newton’s second law
We’re sure you’ve seen this before – it’s over 300 years old, and it’s popular on science memes and T-shirts. It says that the net force on an object is equal to its mass (m) time acceleration (a). But what does it really mean? It’s all an interaction, like when you kick a soccer ball or drop a water bottle on the floor.
Newton’s second law states that these interactions can be described as the concept of “force.” And what does the force do? The net force on an object changes the object’s motion. But wait! There’s something even cooler about this simple-looking equation.
Look at those arrows f and a? This shows a variable that is a vector. That is, it contains one or more pieces of information. For example, if someone asks you to “social distance” of 1 meter, where do you end up? who knows? You can go 1 meter east or west or 39 degrees from north. Distance by itself is not the complete story. You also need to specify the direction. This applies to both force and acceleration. Other quantities (such as mass and temperature) have no direction. Call these scalar values.
Newton’s second law is very useful, but strangely, people don’t seem to believe it. A common misconception is that a constant force moves an object at a constant speed. Rather, what this equation says is that if you push an object with a steady force, it will continue to accelerate.
(TagStoTRASSLATE) Physics (T) Dot Physics (T) Force
