– Considered a sacred text by many top competitors. Instead of just presenting problems, Kalda's work teaches the solution ideas that can unlock over 95% of olympiad mechanics problems. The handout is freely available online and is accompanied by a complete solutions manual created by a community of AoPS users (now spanning 80 pages solving all 86 problems), making it an interactive learning experience.
The Sliding Wedge A block of mass $m$ is placed on a wedge of mass $M$ with angle $\alpha$. The wedge lies on a frictionless horizontal surface. The block is released from rest. Find the acceleration of the wedge $A$. – Considered a sacred text by many top competitors