Go back to the red-dotted problems. These are your weak spots. Solve them again. The PDF format helps here because you can delete your previous rough work and start fresh.
Finding a reliable resource for physics problem-solving is a rite of passage for many engineering and medical aspirants. If you’ve been searching for you likely know that this book is one of the most respected companions for mastering I.E. Irodov’s legendary problems. Problems In Physics By Abhay Kumar Singh Pdf