F=ma Exam 2020 B - Solutions to Selected Problems

During this video, 3 beautiful physics problems from the 2020 F=ma B exam are covered, specifically #17, #18, and #21
#17 is all about using conservation of momentum and energy to analyze a very specific collision that involves 2 masses and even a spring. #18 uses the ideas of virtual work to solve for tensions in a very simple setup with very little information. #21 involves some ideas of how friction acts and involves analyzing the state of the system after a long time.
The F=ma exam is a yearly exam that tests high school students across America in their knowledge in classical mechanics. It is one of the stages in being selected for the US IPhO (International Physics Olympiad) team. Some more information about it can be found here: www.aapt.org/physicsteam/2020...

[@tujan7598]

Amazing problems and solutions as always. Springs are always quite cool!

[@SlippingHexagons]

Thanks!

[@KingD88]

From where can I find the pdf of 2022B??