this side, this length is four.

And we're going to compare it to this length here, which we'll call x.

So x is to four as this drop was 16,000

actually, we'll just call it 16.

We'll keep the thousands off, that'll be easy, just to 5,000.

I mean you could do 16 to 16,000 to 5,000, or five to

16, either way is, is fine. If you solve for x, then you find this

distance x is 1.25 feet. The total distance is four.

So that means this distance is 2.75 feet. So now we know the value of the shear.

The internal value

of the shear force anywhere along the beam,

and we would use that in designing the beam.

You can see on your own, where would be the cases

where you'd have the maximum shear that you'd have to design for?

Take a minute and think about that.

Come on back.

' Kay, those, those locations, the, the worst case is here

[COUGH]

at point C, where I have a shear force of 11,000.

Or here at point F, where I have a shear force of minus 11,000.

Here's another large shear force.

you can see we actually have no shear, as I said, at this point right here.

But we've got a very good sense of how

this shear varies over the entire length of the beam.

And so this is just a clean copy of what I just did so that you can see it.

And that's it for shear force diagrams.