Newton's Laws of Force and Motion

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Sonali Purohit
December 13, 2018
Gateways
Force and Motion Blog
Isaac Newton and his Laws of Motion


Isaac Newton, a notable scientist from the late 1600’s to the early 1700’s, is one of the most impactful scientists in history. Not only is he a household name but he is also inn the same league as Einstein and Cavendish. Some credit him with being the true first building block in Physics, with his exceptionally famous laws of motion. His most remarkable piece of work was his three laws of motion.

This first law was that of inertia. The idea of inertia is that an object at rest will remain in that state unless acted upon by an unbalanced force. This also applies to objects in motion. Have you ever experienced inertia in a car while it is braking to a stop? The force of the road on the locked wheels provides the unbalanced force to change the car's state of motion, yet there is no unbalanced force to change your own state of motion. Thus, you continue in motion, sliding along the seat in forward motion. A person in motion stays in motion with the same speed and in the same direction unless acted upon by the unbalanced force of a seat belt.
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly on the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased. The ,arguably, most important thing to remember is the equation f=ma. Force=mass multiplied by acceleration.
The third law states that for every action, there must be an equal and opposite reaction. Think about sitting in a chair. Your body exerts a force downward and that chair needs to exert an equal force upward or the chair will collapse. It's an issue of symmetry. Acting forces encounter other forces in the opposite direction. Another example is when you jump off a boat. If you have another person examine the boat as you jump off, they will notice that the boat rocks back and forth. The boat is having an equal and opposite reaction to the force you exerted in order to jump off the boat.
Newton pathed the way for Physics and other well known scientists. Without them, we would never be where we are today. So where now? Well, I believe that we can mi the laws of Physics and medicine in order to make cures for illnesses. However, if we advance far enough with the laws of Physics, the possibilities are endless to how far we could run with it.
   https://www.britannica.com/biography/Isaac-Newton

















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