Concept in Physics

Hello everyone. 

Do you know about physics? have any idea??

Physics is a branch of science that concerned with the nature and properties of matter and energy. the subject matter of physics distinguished from that of chemistry and biology. The basic knowledge of Physics we must know about the SI unit, standard prefixes and also the conversion unit. SI unit or the International System of Units is the modern form of the metric system and is the world's most widely used system of measurement. The basic SI units are as follows;

Quantities	SI Unit
Length	Meter (m)
Mass	Kilogram (kg)
Time	Second (s)
Electric Current	Ampere (A)
Temperature	Kelvin (K)

The standard prefixes are used to form decimal multiples and sub multiples of SI units as in the table below;

The study of conversion units are applied when the units given are not consistent, thus we need to convert to appropriate ones. Units can be treated like algebraic quantities that can cancel each other out.
For example;

Next, we learn about the Newton's Law :)
In this topic we must master about forces and mass. Force is an action that can change motion. Force can be used to increase the speed of an object, decreased the speed of an object or change the direction in which an object is moving.

Newton's First Law

Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

Newton's Second Law

The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.

Newton's Third Law

For every action there is an equal and opposite reaction.