Problems for the 38th IYPT 2025 Approved by the IOC on 18 July 2024 Please refer to the official and signed pdf as the authoritative source. 1. Invent Yourself: Paper Boomerang Make a returning boomerang from a sheet of paper by folding and/or cutting. Investigate how its motion depends on relevant parameters. 2. Air Muscle Place a balloon inside a … Continue reading Problems