Question

how to study the physics and become expert?

Answer 1

heya

to study any subject we just have to
- clear every doubt.
- in physics, there is only formulas to learn and understand. if we understand the formula then physics is very easy.

to become expert in any subject u have to do
- practice more as possible.
- try to solve hard problem.
- clear ur every doubt.

by following this we can become expert in any subject, no matter how hard that subject is.

thank you and all the best.
tiashasha
Benefactor
English Shakespeare

Answer 2

Physics was my strongest subject .

a)  Basic Law: e.g. Newton's Law, Gravitation law, Ampere's Law, Bernoulli's Equation etc. These laws are foundation stone of Physics. You must know these laws in detail. You should know application & exception of these laws and how to use these laws.

b)  Derivation of the formula: In physics, many formulas are derived from Basic laws. You should not only remember the formula but also its derivation. Derivation with each step understood in details.
Most of the time, we remember the formula but forget the constraint and apply the formula outside its applicable boundary. 
E.g. S = ut + (1/2)at^2. This is valid only when acceleration is constant. If acceleration is not constant, we can no longer apply this formula.
Here is the thumb rule:
If constraint is broken, do not apply the formula. Take a small part (disgustingly small dx part), apply the basic law and write a differential equation. Integrate it then put limiting condition.
For more details on constrains and use of integration read (Where and how to use integration?)

d)  Application: Learn the application of formula and basic laws. 
E.g. law of energy conservation can be used in friction-less projectile motion, pendulum, springs, when earth rotates around sun etc.
Also learn where you cannot apply theses concepts
E.g. When friction is present you cannot use energy conservation in a significant way. 

When you learn anything in physics you must ensure, you learnt;Basic LawFormulaIt's derivationConstraintsHow to use integration when constraint is brokenApplication and non-application.Understand each and every stepThese all points combined are called concepts of physics.

2. First learn Basics than practice to become an expert:To be an expert in physics you need to follow these three steps:

A complex problem is nothing but the combination of several easy problems. Most students will solve these easy problems separately but to solve a complex problem they need to think systematically, identify these easy problems and recall many concepts at the same time .This systematical thinking, identification and power to recall make these problems difficult but these qualities can be developed with a well guided approach. 
 
Good news, I am here to guide you. Now sit tight and be ready for a flight.

Systematical thinking and Identification of problems:
Practice is the key to develop these skills. More practice means more control over basics means easy amalgamation of different concepts.Approach difficult problems with positive attitude. You can solve any problem, It does not matter how much time you will need and it is OK to refer some notes/ books. This is your learning phase not the exam.Use a trace back method to solve these problems. First identify what is being asked and recall concepts related to it.I will give an example:E.g. ‘A particle is projected with a speed u at an angle ѳ with the horizontal. Consider a small part of it’s path at height h and take it approximately to be a circular arc. What is the radius of curvature at this point?'
We need to find 'radius of curvature'. This is related to circular motion so recall concepts related to circular motion, recall every thing related to circular motion than we will choose what we can use. Concepts:v = wr,r = ѳ * arc length,A centrifugal force is necessary to maintain circular motion. This force is perpendicular to direction of velocity.Now refer to data given in question and choose the concept we can use.We cannot use v = wr or r = ѳ * arc length, as w & ѳ are not knownOnly force acting on particle is mg (gravitation force), so centrifugal force is provided by gravity. This concept can be used.Now recall the concepts related to the problem, We will use them together.Many different concepts are involved. Circular motion, projectile motion, gravitation, newtons law.Concepts of circular motion will give us a radial acceleration (v*v/r) and its direction perpendicular to velocity.Concepts of gravity will give us a force mg acting downwards.Concepts of newton's law will help us to balance force & acceleration equation (F = ma) along the line perpendicular to velocity.Concept of projectile will give us velocity at height h and angle between horizontal and velocity.
Now I leave this solution for readers. If you do not understand any part feel free to sent me a message. Mayank Jain
3.  Importance of self-studyTo become expert in anything, You must learn it and practice it. I have seen many students who rush through learning part and move to practice but without proper learning practice will be ineffective. I am not telling you practice is not important but learning is more important. 
''Happy Learning"