14:10 why are both moments negative in the function? In the FBD, 1 is clockwise and the other is counterclockwise, wouldn't one be positive in the function?
@@CivilEng_Amir oops, the support moment of 216 and the external moment of 40, in the diagram they are opposite directions but in the moment graph they are both negative I might be understanding it wrong though I'm new to the topic
@@chiefbeef6047 No, that's a great question actually, and sorry for the confusion. The support moment of 216 is negative, and the external moment of 40 is positive. At an x slightly smaller than 10 (for example 9.99999), your internal moment using the second function (8x-120) will be approximately equal to negative 40, and then at x=10, you have a positive external moment of 40. Now if you add that positive external moment of 40 to the negative internal one, you'll be back again at M=0. That's why we have that vertical line at the end. I'll try to solve more problems like this and explain it better!
just in time for finals haha thanks from the UK
Good luck on your finals 😁💪🏽
Tnx Amir. ❤❤❤
14:10 why are both moments negative in the function? In the FBD, 1 is clockwise and the other is counterclockwise, wouldn't one be positive in the function?
Which two moments are you referring to?
@@CivilEng_Amir oops, the support moment of 216 and the external moment of 40, in the diagram they are opposite directions but in the moment graph they are both negative
I might be understanding it wrong though I'm new to the topic
@@chiefbeef6047 No, that's a great question actually, and sorry for the confusion. The support moment of 216 is negative, and the external moment of 40 is positive. At an x slightly smaller than 10 (for example 9.99999), your internal moment using the second function (8x-120) will be approximately equal to negative 40, and then at x=10, you have a positive external moment of 40. Now if you add that positive external moment of 40 to the negative internal one, you'll be back again at M=0. That's why we have that vertical line at the end. I'll try to solve more problems like this and explain it better!
@@CivilEng_Amir That explained it perfectly! thank you :)
@@chiefbeef6047 You're very welcome! I'm glad it made sense.
How 10-x distance will come.? Its only x
The total length of the beam is 10 ft, and we cut the beam at a distance x from the left end; So the length of the right segment will be 10-x.
@@CivilEng_Amir thanks sir.
@@CivilEng_Amir plz upload more videos on cut sections of beam
@@CRICKETEDITZ326 will do, stay tuned!