00:01
All right, so how we want to start this off, let's think about the summation of the horizontal forces.
00:09
So, this is going to be negative cx plus 1 ,200 equal to zero.
00:22
So therefore, that's going to be just cx equal to 1 ,200.
00:28
All right, so how we want to start this off, let's think about the summation of the horizontal.
00:36
And now let's think about the vertical forces, so the sum of the vertical forces, which we're going to have as a y minus cy minus 800.
00:56
That's going to be equal to zero.
00:58
So we're going to have a .y minus cy equal to 800.
01:05
We know that cy is 12.
01:12
I don't try that c, x, that's mine.
01:13
So what we got to do here is look at the moment.
01:19
So the moment i see.
01:22
So the summation of the moments, we're going to have as a y times six minus a hundred times three minus 1 ,200 times four.
01:40
All that equal to zero.
01:44
So doing this, we can find that a y is going to be 1 ,200.
01:49
And that's going to be newton's.
01:51
So if a .y is 1200, then cy is going to be 400...