This postulate is known as the law of inertia.
When a person has a motor vehicle accident and presents to the ER, several questions emerge: Well, the answer is actually pretty simple.
A body will stay in motion or continue to move at uniform speed in a straight line unless acted upon by an external force. The force that acts on a body is directly proportional to the rate at which that body is accelerating.
To every action there is an equal and opposite reaction. So what does this have to do with the patient who presents with injuries resulting from a car accident? Now think about this in the context of sitting in a moving car. If the car comes to a sudden stop, you will continue to move forward.
This is why you always slow down before stopping the car, so that your body slows down too and comes to rest with the car. Wear a seat belt — let the seat belt provide that external force that stops your motion, and not the dashboard or the windscreen.
In other words, if you slam your fist into a wall with a force of 40lbs, the wall will slam your fist right back with a force of 40lbs.
This is also why it hurts when you jump from a particular height above the ground. You hit the ground with a particular force, and it hits you right back.
You will hit that object with a force that is the product of your mass and the acceleration of the vehicle that you were in. And according to what we said about the third law, the thing that stops your motion will hit you back with the same force.
This is why you can get injuries even from a seat belt to your tissues or internal organs, because that seat belt hits you with the same force you hit it with, and that force depends on your mass and the acceleration of the vehicle.
Use a seat belt — it hits you just as hard but not as broadly, and it only affects a small part of you, and not your head or other places. Ease up on that pedal.
I could add, lose mass, or lose weight, but the speed is way more of an issue than that piece of cake I had in the ER today. However, it does matter, and I will explain more in another post.
So, not to belabor the point, but here are the main points again.forces & Newton’s laws of motion. physics N 2 forces (examples) a push is a force a pull is a force Newton’s ﬁrst law!
Isaac Newton ﬁrst proposed the following law of “the” unit of force! the Newton, N, is deﬁned to be the force required to impart an acceleration of 1 m/s2 to a 1 kg mass.
Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). Isaac Newton's First Law of Motion states, "A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force." What, then, happens to a.
We think about what a force is and how Newton changed the world's (and possibly your) view of how reality works.
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Newton's Second Law as stated below applies to a wide range of physical phenomena, but it is not a fundamental principle like the Conservation Laws.
It is applicable only if the force is the net external force. Sir Isaac Newton; First Law of Motion; Second Law of Motion; Third Law of Motion; Review Newton's Laws; Quiz; Quiz Answers; Hot Wheels Lab; Balloon Racers.