**Physics** is a fundamental science, therefore, there is no need to persuade anyone how **physics** is important for engineers. Physics describes with language of mathematics phenomenas which are met in nature. This site contains plenty of examples from various field of physics. Physics exercises which are solved here, will be very helpful in physics understanding. Physics is in general divided into two main parts. First is **classical physics** in which we examine nature of macroscopic objects. In brief classical physics treats about objects which we can see and touch. Second is **modern physics** in which we examine microscopic or a lot of smaller objects. In brief modern physics treats about objects which we can’t see and touch.

## Measurement units

There are various of **metric systems** and with every metric system are associated measurement units. Because of this situation issues between translations from one metric system to another have appeared, therefore, the **SI measurement system** has been created. The main idea of SI system is that there are only seven base SI units and all other units are combinations of base SI units.

## E=mc^{2} formula derivation

Who have not ever met E=m·c^{2} formula? It is probably the most famous formula in the world. This formula given for us by Albert Einstein ties in one equation mass and energy. Special theory of relativity was published by Albert Einstein in 1905 and this elaboration contained derivation of equation for relation between mass and energy. In short we can say that E=mc^{2} tells us that mass and energy are equivalent. I believe that you are interested to know from where this formula comes from.

Derivation of E=mc^{2} formula

## Mechanics

**Mechanics** is a field of physics. On my website it is whole branch about mechanics divided to four main parts like: statics, kinematics, dynamics and mechanics of materials. Mechanics describes a rules of motion and magnitudes related to motion. Mechanics is usually the first branch of physics which is introduced to students during physics courses because all future branches of physics widely apply mechanics principles.

## Electromagnetism

**Electrical engineering** is a field of physics. On this website it is whole branch about electrical engineering where plenty of various examples regarded to Kirchhoff’s current law (KCL) and Kirchhoff’s voltage law (KVL) are placed.

## Harmonic vibrations

**Harmonic vibrations** are very interesting phenomena in physics. Knowledge about harmonic vibrations in electrical systems and mechanical systems is very important. You will find here a few examples which will try to explain you a nature of harmonic vibrations.

Harmonic vibrations and harmonic motion examples

## Archimedes principle

Why do some objects stay on water surface level or sink under water? Why do some objects fly in air or stay on the ground? Answer for that questions gave as long time ago Archimedes. Explanation for mentioned questions is in Archimedes principle.