Internal force sign convention

This engineering statics tutorial goes over the internal sign convention for beam bending. It is all based on virtual cuts, and the internal forces: axial force, shear force, and internal bending moment. Which side of the virtual cut you are inspecting is important. You 100% need to memorize the positive sign convention here, as it is used in statics, mechanics of materials, and all structural engineering and analysis courses that involve beam bending. Understanding and being quick with this sign convention will be important for being able to draw shear force diagrams and bending moment diagrams, which are a big part of all of the courses just mentioned. If you found this video helpful, please consider supporting my work on Patreon:   / engineer4free   Looking for more statics tutorials? Check out all of the videos that I made: YouTube:    • Dynamics   Website: https://www.engineer4free.com/statics Looking for practice problems with solutions? I also created a whole set of fully solved statics problems with step-by-step hand calculations: https://www.engineer4free.com/statics... Looking for software? I highly recommend checking out SkyCiv. They make a full suite of online structural analysis software and tools that are useful for both students and professionals, including calculators for beams, trusses, frames, moment of inertia and more. It’s great for checking your work: https://bit.ly/skyciv-e4f Lastly, don’t forget to subscribe on YouTube and join the Engineer4Free mail list: Subscribe:    / @engineer4free   Mail List: https://www.engineer4free.com/newsletter Thanks for watching, I hope it helps!