00:01
So in this question, we're trying to cross a river.
00:02
And we know the river travels in the negative wide direction at 1 .3 meters per second.
00:09
We want the boat to go across straight at 5 .5 meters per second.
00:14
So that means that the boat actually has to go in this direction.
00:19
So we want to know what angle is this and what value of velocity is that.
00:24
So what we have to do is we have to break this up into components.
00:28
So we need the horizontal component.
00:33
And the vertical component.
00:35
And this is going to be v.
00:37
Sine theta, and this is going to be v.
00:41
Kos theta.
00:46
So, we now have two equations that we can write.
00:49
We know that horizontal velocity, so v...