00:01
Hello.
00:02
So we have a diagram like this.
00:04
I'm trying to figure out the resultant force.
00:09
So we have to be resolving some forces.
00:11
Let's take care of the force f3.
00:15
This is f1.
00:17
So here we need to extend this this way.
00:21
So here and then we have an angle here.
00:29
So this angle, you go to this angle to this angle.
00:34
So that's theta.
00:37
So now, so this is f3, which is six, that's the direction.
00:49
So now we need to resolve this in the x and in the y direction.
00:54
So let's talk about x direction.
01:03
So the resultant in the x direction.
01:10
So the one going to the positive x direction is 900.
01:15
And then this f3 here has another component in the x direction, which is on this line right here.
01:25
So if you do the resolution, this is the angle.
01:28
That's going to be a cosine.
01:30
So that's plus 650 cosine of theta.
01:42
We'll come back to what theta is.
01:47
F2 also has a component on the x -axis, and that's going to be a cosine.
01:58
So we're going to have plus, let's see, a 750 cosine of 45.
02:14
Okay, so that's the total because there's no force in the negative x direction so you don't have to do any subtraction so let's have 900 900 plus just a second so let's talk about what cost data is so when you come here this angle and this angle are the same so what is this angle data? same of this under data so that's this cost data is just 4 over 5.
02:53
Right? so we can do for this...