This is a tutorial animation on planar failure analysis and Culmann's method that our team created, and can also be found here: https://www.geoengineer.org/education/slope-stability/slope-stability-analysis/slope-stability-single-free-body-procedures Visit https://www.geoengineer.org/education for more educational content, or https://www.geoengineer.org/ to discover all about geotechnical engineering!