Use GDZ to check qualitative reasoning —logical conclusions based on physical laws—not just the final numerical answer.
Solve the problem independently by writing out known variables and general equations first.
If the answers differ, re-examine the steps to identify if the error was in the mathematical calculation or the understanding of the physical phenomenon. Исаченкова Л. А. - Аверсэв
Depending on the specific grade level (typically 7th, 8th, or 9th), the homework solutions usually cover core branches of physics :