00:01
Hello, so this is the diagram we've been giving you and have four velocities.
00:09
We're trying to find out the resultant.
00:14
So let's say this is one, two, three, and four.
00:21
So let's talk about one.
00:24
So for this we have to resolve the forces, right? so if we do the total velocity in a form of vector, so let's look at one.
00:43
And this is 15 at an angle of 60 degrees to the vertical.
00:52
So if you do, so we're looking for the xy components.
01:01
So for 1, it's going to be the x component is going to be 1.
01:09
It's going to be 15, uh, sine 60 or cost 30 is the same thing.
01:19
But it's here, so it's got to be negative, right? it's here so because it's on the negative side of the axis side it's negative also going to have negative 15 i can use cost 30 it doesn't matter the same assign 60 and then for the y component that's going to be 15 cost 60 so that's 15 cost 60 so that is for 1 let's look at 2 2 has only one direction so it's only y, no x, right? so it's zero, and then y is just 11.
01:59
So that is okay.
02:01
For number 3, so we can extend number 3 to this side, which is still 3, this angle is still 42.
02:13
Okay, so now we can resolve it.
02:16
So let's look at the x component of that.
02:19
So for, and that's quadrant, everything is negative, so let's be careful.
02:23
So for the x, that's going to be, not the velocity, that's 13, so that's 13, sine 42.
02:39
That is some, if you complete a triangle here, and this is going to be the x component, right? so that's opposite, so that's sign.
02:46
It's negative.
02:47
So i've got to put my negative there.
02:49
And then for the y component, that's going to be 13, cost 42.
02:58
That also has to be negative.
03:01
Let's look at number four.
03:06
Oh yeah, number four is here...