It seems simple. But it requires combining circular motion dynamics (centripetal force = mg cosθ – normal force) with energy conservation (mgh = ½ mv²) and the condition for losing contact (normal force = 0). The answer comes out as h = R/3 from the top. A high school student can solve it; a university student must solve it in 5 minutes.
, is working to provide detailed explanations for all 2,023 problems. As of early 2026, over 75% of these problems have been solved and peer-reviewed. Educational Insights: savchenko physics pdf
Because of its difficulty, the book has inspired several global, student-led initiatives to make its content more accessible. Digital Access: It seems simple
In the international physics community and English-speaking academic circles, this famous Russian problem book is widely referred to as This is because Oleg Ivanovich Savchenko was the original editor of the Moscow Institute of Physics and Technology (MIPT) correspondence school physics curriculum, and his name often appears prominently on the cover or in the title of the compilation books used by students. A high school student can solve it; a