IFDK

so for the past 1 month we've been having like 3-5 chapters in each subject typa mocks...and i always manage pretty well in maths and chemistry BUT physics has been mentally knocking me down completely I can't seem to even cross 20 marks ANY SUGGESTIONS PLS IDK WHO TO ASK FOR HELP ANYMORE (I have optics completely this wednesday maybe suggestions on how to get around 50-60)