# WHAT

A vast number of physicists have succeeded in trying to explain the different phenomena of the world while others have proved to be futile. The laws of physics are considered to be fundamental, though some of them are theoretical as they are hard to replicate in the real world. Below are the four major laws of physics.

## Law of Gravity as one of the Laws of Physics

Sir Isaac Newton, a physics protagonist, tried to explain the phenomena of gravity in his book well known as 'The Principia.' According to the book, it outlines the theories about motion and gravity. The law of gravity asserts that an object attracts another object in direct proportion to their combined mass and inversely related to the square of the distance between the two.

## Law of Motion as one of the Laws of Physics

The law of motion describes the relationship between the object's acceleration and the forces acting upon it. The law is broadly explained in three basic rules that form the basis of classical mechanics which tend to describe the reaction of objects or body towards external forces.

• First rule. The rule, also known as the law of inertia, suggests that an object will remain still unless an external force changes a condition.
• Second rule. In this case, the force applied is equal to the change in momentum over some time. This means that the force is equivalent to the mass multiplied by the acceleration.
• Third rule. It implies the conservation of momentum. It asserts that for the applied force by the first object, there must be an equal force from the second object as well which in turn cancels the applied force.
• ## Law Of Thermodynamics

It was first explored in the mid 16th century by three physicists, Robert Boyle and Robert Hooke in Britain, and Otto Von Guericke in Germany. Although all the scientists used the vacuum pumps in their experiments, Otto Von Guericke emerged as the trailblazer by studying the principles of volume, temperature, and pressure. Law of thermodynamics is explained in four significant theorems.

• The Zeroeth law of dynamics which explains the notion of heat and how thermodynamic systems get thermal equilibrium among each other.
• First law of thermodynamics, well known as the law of conservation of energy, suggests that energy can neither be created nor destroyed; instead, it can only change its form.
• The second law of thermodynamics illustrates the relation of isolated systems towards the natural flow of heat within a closed system.
• Third law of thermodynamics describes how the entropy of a system approaches an invariant value as temperatures approach the absolute zero, thus making it impossible to have a perfectly efficient process.
• ## Law Of Conservation Of Mass And Energy

This law was adopted from Albert Einstein's theory of special relativity explaining the electrodynamics of moving bodies. The theorem is defined in two principles.

• The principle of relativity. This reveals the similarity in equations describing the law of physics in all inertial reference frames.
• The principle of the invariant speed of light. It explains how the light's speed in a vacuum is similar to observers drifting through a gravity-free space.
• As can be seen, the laws are very much relevant and still apply in this day and age of every individual. Feel free to contact us anytime for physics help online and more information regarding the subject.

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