00:01
Our first vector points downwards from the horizontal at a 25 degree angle and has a magnitude of 50.
00:13
Drawing the components, well, if this is our starting point, our horizontal component looks like this, and our vertical component looks like this.
00:30
That's our labels.
00:32
I'm going to call these x and y, call the resultant s.
00:39
And then for the values of the components, well, is going to be magnitude 50 times the cost.
00:56
Cosine of, and let's pay attention to this because this is 25 degrees under the horizontal.
01:04
When we put it in to our equation, we need to put in negative 25 degrees, which gets us 45 .3.
01:18
Then our y component is 50 times the sign of minus 25 degrees.
01:33
Which, putting that into our calculator, we get negative 21 .1.
01:48
Take the second case, we're given a vector with magnitude of 80.
01:58
The resultant m and we say that this is measured 40 degrees from the vertical.
02:09
Okay...