Physics

How does physics word come from?

This word come from Greek ἡ φύσις, which means study of nature . Physics the natural science that studies matter ,its motion and behavior through space and time, and the related entities of energy and force.   

The highlighted bolt words which are define.

1. About Matter

Everything which occupies space , have its volume and have mass is known as matter.

Atoms are building blocks of matter .

a  .Neutron ,have neutral charge and  these partical have also mass.

Mass of neutron = 1.6×10^-26kg

b . Proton ,have positive charge (+) and this partical  have also mass.

Mass of proton =1.6×10^-26kg

c . Electron , have negative charge (-)    and also have mass.

Mass of electron =9.1×10^-31 kg

Some about matter

Matter exists in various state . These include classical everyday phases such as solid liquid , and gas.

2. About  Motion

Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time. 

Motion applies to various physical systems: to objects, bodies, matter particles, matter fields, radiation, radiation fields, radiation particles, curvature and space-time. One can also speak of motion of images, shapes and boundaries. So, the term motion, in general, signifies a continuous change in the positions or configuration of a physical system in space.

The main quantity that measures the motion of a body is momentum. An object’s momentum increases with the object’s mass and with its velocity. The total momentum of all objects in an isolated system (one not affected by external forces) does not change with time, as described by the law of     conservation of momentum. An object’s motion, and thus its momentum, cannot change unless a force acts on the body.

3. Energy

In 1802 lectures to the Royal Society, Thomas Young was the first to use the term “energy” in its modern sense

The capacity of doing work is known as energy . Energy is measure in Joule (j).

Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object’s position in a force field (gravitational, electric or magnetic), the elastic energy stored by stretching solid objects, the chemical energy released when a fuel burns, the radiant energy carried by light, and the thermal energy due to an object’s temperature.