Why it is always not easy to teach physics?

The subjects like Science and mathematics are not easily learnt and taught. That is why more intelligent students get admission to Science stream.  Physics is an important branch of Science. This needs systematic study, concentration, experiments and hard work unlike subjects like History, literature that may be read like novels.  If a student is absent for a few days, he will not be able to keep with rest of the class after rejoining but this is no problem for arts/ humanities subjects. 

Teching physics is hard because physics is a very tough subject and it needs practical knowledge, dedication and students intrest also 

As everybody knows that physics is not very easy to learn and also to teach.Even highly qualified teachers are also sometimes uanble to solve some sums related to phusics, This subject contains a very huge amount of calculations and we require a logic to clear it. First of all it is necessary that we should understand the problem i.e., sum very clearly and use proper logic to solve it. So, if someone wants to become master in physics then he should be hardworking person and always need to use his mind sharply to solve every question successfully.

It is a misconception fixed in our minds that physics is difficult and therefore, we feel that it is tough to learn and teach. however, physics is quite easy subject. It is a practical subject based upon our daily life. From the beginning of Newton's laws of motion to the Einsteen's energy-mass equivalence theorem, physics is the only complexity we face in day-to-day lives. It is a different facts that teachers do not teach this subject innovatively. Most of the physics teachers promote students to cram and do not allow them to understand the complex facts with easy examples. This is because the Indian education system is marks-oriented. Easy Examples with the understanding of complex facts won't fetch any marks because they lack the bookish language, they are not plagiarised. People here just cram up things hence, they find difficulty in a subject like physics wherein cramming is not possible. It is difficult to cram up derivations but easy to understand them and solve logically. Once logic is in the head, numerical problems can be easily analyzed so, physics is easy but only if taught and studied in a way to promote understanding and discourage cramming.

Physics is not difficult. If you bring interest from very beginning of your childhood, you will get into it. Sometimes i gets complicate, but this how the subject is conceptualize. If you understand that concept, it keeps on becoming easier.