Hey! I have gotta solution to share with you which worked with my weakness in Physics. First of all make it a point that you have to make your concepts clear, write all the formulae, chapterwise, in a book and revise them frequently, try keeping them handy. While solving the questions initially, its okay to keep the Physics book open and the formulae as well, if you are unable to solve or understand the questions, it gives you an idea of what kind of concepts are used to trick us, and the concept which help us to tackle it, Initially, scores will be less but once u get used to the problem solving trust me you will love solving Physics, Dont run behind scoring mrks, instead look out for the silly/major mistakes you do while you go through the corrections, and write the mistakes besides the question itself! It helped me a lot, trust me;) Try to solve as much as questions you can, improvise yourself towards the subject and marks will elevate automatically! All The Best, and do solve previous year question papers, they give an idea to us about to what level we should squeeze out brains out and drain our smartness. Hope This Helps, give it a try, alteast for a week