The world is governed by different natural laws from which, even if you want, you can never get rid. It is important to know them because even if you don’t want to believe it, there they are. These are the 7 most important laws of physics that you can never get rid of.
Did you think that what you learned in school had no practical application? Here we show you 5 daily examples in which physics is put into action. You will surely be surprised!
1. The forces of the action-reaction principle
Newton’s third law says that when a body A exerts a force on another body B, A performs another equal force but in the opposite direction. This explains why when we push someone to fall into the pool, our body tends to do the same movement but in the opposite direction. Or when we jump up, our bodies use the ground to propel us.
2. Balls never stop rolling, even in a straight line
The law of inertia states that if no force acts on a body, it will remain, indefinitely, moving in a straight line with constant speed. We could relate that to a ball that keeps rolling in a straight line until someone stops it. Now you understand what happens when in a basketball game, the ball goes and you run after it without stopping.
3. You may be a dreamer, but your feet will always be touching the ground
We could say that gravity represents the weight of a body and the physical force exerted by the mass of the bodies on the ground is due to gravity. This variable slows down objects that are thrown upwards and accelerates those that move downwards. It also affects movement because it slows down or sets objects in motion. And this falls on our day to day, such as when you decide to cook scrambled eggs and they open prematurely when they fall to the ground.
4. Your food is kept cold in the refrigerator with heat
The passage of heat from a cold body to a hot one does not occur spontaneously; this is specified by the second principle of thermodynamics (a branch of physics that studies the interaction between heat and other manifestations of energy), but the statement of Clausius added a change: “It is not possible to pass heat from a cold body to a hot one without consuming work.” For this reason, refrigerators use electrical energy to create heat and in turn transfer it to keep our products very fresh through thermodynamic transformations. Did you imagine that your favorite ice cream received heat? Contradictory, isn’t it?
5. The relationship between what you spend on traffic tickets and acceleration
The accelerator is the lever that drives us to increase the speed of the car even though we know that we should not. We experience this theory often and it is easy to understand. If you drive at a speed of 50 km / h and after approximately 2.5 seconds the speedometer changes to 120 km / h, it can be said that the speed varied 70 km / h in the blink of an eye. This is the change in speed in the elapsed time, that is, the acceleration, but that you generally calculate in dollars when you get a fine.
