Newtonian Mechanics is a vast and important topic in Classical Physics as well as Physics.
Suppose kicking a stationary ball. It will easily move forward.
[ Newtonian Mechanics ]
If you try to move a stationary private car in the same way, it will not move so easily.
Suppose again a child riding a small bicycle is moving forward, you see a moving truck, you pull the bicycle from behind, you can easily stop it .But you cannot stop the moving truck so easily even if you want. In the case of ball, private car, small bicycle and truck, the mass of both cricket ball and small bicycle is less and the mass of both private car and truck is very high.
In addition, it is easy to move a cricket ball and stop a small bicycle, but it is difficult to move a private car or stop a truck. In other words, the truck is more prone to maintain its mobility and the private car is more prone to maintain its stability whereas the cricket ball shows its stance and the smaller bicycle demonstrates the opposite in maintaining its mobility.
From these examples it is clear that relatively high-mass objects are more prone to retain their position. The tendency of an object to maintain its own state is defined as inertia in physics. The greater the mass of an object, the greater its inertia. Again, the lower the mass of the object, the lower its inertia. Inertia is basically a measurement of the mass of an object.
In 1687, Sir Isaac Newton provided three flaws in his famous book, Naturalis, Philosophia Principia Mathematica. In these formulas he showed the relationship between the mass of an object i.e. inertia, motion and force.These three formulas are called Newton’s laws. And these formulas are the basis of Newtonian physics.
Newtonian physics is also called classical mechanics. With the help of various formulas of Newtonian Physics it is possible to explain the structure and activity of most of the objects in the universe. Newtonian mechanics formulas are especially effective in the case of large-sized objects. Newton’s law of motion and Newtonian mechanics formulas do not apply to very small substances, such as electrons, protons, neutrons. Einstein’s theory of relativity is used instead of Newtonian mechanics for objects whose velocity is close to the speed of light. If the acceleration is so low that the acceleration of an object is 10-10 meters per second or less than that, then it is not possible to apply Newton’s law of motion there.
But because Newtonian physics is relatively easy to solve mathematical problems, it remains the standard for calculating the motions of almost all objects, from instrument parts, liquids and bullets to spacecraft, planets and galaxies.
In order to change the dynamics or stability of an object, something special needs to be applied. This special thing, when applied, makes a stationary object move or prone to move, or a moving object becomes or prone to become stable, is defined as force in physics.
Newton’s first law basically introduces us to the concept of force and inertia. According to this formula, “If no external force is applied, the stationary object will remain stationary forever and the moving object will continue to move in a straight line at the same speed.” That is, force is needed to move an object, so is force is needed to bring stability to a moving object.
Newton’s second law indicates the relationship between force and momentum of an object. According to this formula, the rate of change of momentum of an object is proportional to the force applied to it and the direction of application of force and the direction of change of momentum are the same. From this relation it is possible to later prove the equation F = ma.
According to Newton’s third law, “Every action has an equal and opposite reaction.”
According to Newton’s third law, all the forces in the universe are in pairs. If the action is applied, there must be a reaction.
Newton’s formulas are used to explain many other everyday phenomena, including horse-drawn carriages, boat pulls, gunshots, and bird-flying techniques. Newtonian mechanics is also used to review the motion of rockets.
With the help of Newtonian mechanics, it is possible to solve the problem of elastic collisions using the principle of constant linear momentum and preservation of momentum.
In Newtonian mechanics angular momentum, angular velocity, angular acceleration, angular momentum, etc., and similar quantities of linear motion, and their relationships are discussed which are later widely used in various fields of science and engineering. Torque , centrifugal and anti-centrifugal force, street banking etc. are widely used in civil engineering and mechanical engineering. Road banking angles are used as the main basis in road designing to avoid accidents in remote hilly areas.
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