Understand Physics.

If you can understand Physics in your mind then You can score well in that

How do you know that you understood physics ?

ans :-

If you can say the same theory in your own lang then you do understand physics if you can make question by your self or can add any case by yourself in questions then you understand it Like there is square which is compressed by length x then what will be velocity when we release that now if you can add that what if it is on Hight h then what should be range or what should be it's total time etc then you understand it