00:01
In this problem we have been given that a current is moving towards north.
00:06
So let's make the direction reference here.
00:10
So n -e s and w represents northeast, southwest respectively.
00:16
So the direction of current is along the north and the speed of current is 3 meter per second.
00:24
So that's the velocity of river we can say.
00:26
And the motor boat is traveling towards east.
00:30
So that's to the right here according to the direction.
00:34
And the speed of motorboat, let's represent by vb, and that's 4 meter per second.
00:40
So we need to compute the resultant velocity of the motorboat.
00:44
So as we can observe, that motorboat will be affected by this current velocity.
00:51
So they are in the perpendicular direction.
00:53
So the resultant velocity will be root of.
00:57
We can just compute in terms of the vector.
01:01
So we can take the direction along east as x and the direction along north as the positive y direction...