FE Exam Review - Mechanics of Materials - Shear and Moment Diagrams - MATH MISTAKE

[@Champagne_Rio]

The height of the big triangle is 200 not 250 right? (150+50)

[@directhubfeexam]

Yes the solution is wrong. Sorry about this

[@holipinieo1]

@@directhubfeexam Max moment is 562, no?

[@1234SLUR]

@@holipinieo1 yessirr

[@dennypereyra4033]

He says that the max is 500, but i think is 562. Its confusing

[@directhubfeexam]

@@dennypereyra4033 Did I do this right? I think it should be 500.

[@zainabnateqi5992]

What is the max finally? I am confused. In the other video someone said max moment is when shear is zero. So in this case it should be 62.5 am I right?

[@directhubfeexam]

Hi Zainab, the 62.5 is the maximum positive moment (thinking of the beam bending concave up). The absolute maximum moment would be the -500 (this is a negative bending moment that bends concave down). www.google.com/url?sa=i&url=https%3A%2F%2Farchexamacademy.com%2Fdetermining-positive-and-negative-moment-in-a-beam%2F&psig=AOvVaw2fB1bB6frTzAokhq42F0fh&ust=1629583280995000&source=images&cd=vfe&ved=0CAsQjRxqFwoTCMDZ-fnMwPICFQAAAAAdAAAAABAD

[@zainabnateqi5992]

@@directhubfeexam thank you so much for explanation

[@nmancero]

“So the maximum magnitude is just the maximum magnitude” ahhahaahha

[@directhubfeexam]

Oh yeah, it is 😁

[@francisvalenti2541]

Height is wrong

[@directhubfeexam]

@@francisvalenti2541 it is! Corrected comment is pinned!

[@samrae5590]

X= 2 not 2.5

[@majeedsofy2050]

X=2 not 2.5

[@LetsGoBoyce]

How did you get 2? height of small triangle=50, height of big triangle=150+50=200. Then length of small triangle=x, length of big triangle is 10. So we get 50/x=200/10, x=2.5. Genuinely asking because I don't want to miss a mistake.

[@unggoymaster1217]

@@LetsGoBoyce 2.5 is correct. Its just at 5:10 to 6:50 the triangle dimensions is incorrect, which leds to the incorrect height of 2.