Shear force calculation for 3 > x > 4 section

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smr101
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< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >[/color]

Hi, I'm having problems with the shear force question attached. I've attached the solution as well.

I'm looking at 2. (b), I have the 0 > x > 3 bit, but I'm struggling with the 3 > x > 4 section. Where is the 8 coming from?

Help is much appreciated
.
http://snag.gy/YnZBu.jpg

http://snag.gy/rcA39.jpg
 
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smr101 said:
< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >

Hi, I'm having problems with the shear force question attached. I've attached the solution as well.

I'm looking at 2. (b), I have the 0 > x > 3 bit, but I'm struggling with the 3 > x > 4 section. Where is the 8 coming from?

Help is much appreciated
.
http://snag.gy/YnZBu.jpg

What calculations have you done to solve this problem? If you had done the basic calculations to determine the reactions at the ends of the beam, the answer to your question would become apparent.
 
SteamKing said:
What calculations have you done to solve this problem? If you had done the basic calculations to determine the reactions at the ends of the beam, the answer to your question would become apparent.
Yeah, thanks, I've worked it out. In regards to (e) how is the maximum bending moment calculated?

Thanks.
 
smr101 said:
Yeah, thanks, I've worked it out. In regards to (e) how is the maximum bending moment calculated?

Thanks.

Any location where the shear force is zero is also a location where the BM is either a local maximum or a local minimum.