All videos on this channel regarding civil engg concepts are beyond appreciation.Just felt like I know something very great. Plz upload other concepts too.
If an object is not somehow forced to rotate about a specific point A, it rotates about its center of gravity. Do if the question is just: is it in equilibrium? then the answer is: chose any point you like. If it is in equilibrium, then the moments cancel each other for all points. That includes the point you have chosen. If you need more, eg figure out how exactly the object will rotate and what momentum remains, then you have to calculate the center of gravity first. But this case is rare as usualy rotating bodies are not in free fall but are attached to some axis of rotation.
Hi! The material is awesome. Could you enable the contributions of the community so we can make the subs in another languages and make the knowledge get to more people? Thanks!
If you hold the beam at two points, you can ALWAYS hold it horizontally, making this example a lie, i.e. the woman is showing with her hands what she is supposed to, but she could just as well demonstrate the opposite! You should just support the beam at the one point (centre of mass). VERY BAD EXPLANATION therefore!
