00:01
All right, so let's say we have an airplane, and this is our plane.
00:06
It has like propellers or something like this.
00:08
And we're told that it's flying at a speed of 440 kilometers an hour, and its wings are tilted relative to the horizontal at an angle of 37 degrees.
00:20
So we want to know what is the radius of the circle here.
00:24
So the lift force, presumably, we're told, acts perpendicular to the wing.
00:28
So we'll call this fl.
00:29
And then of course the weight acts this way and then our centripetal force acts this way.
00:37
So if we look at it, all right, so the centripetal force times the sine of theta should equal our lift force.
00:51
And then if we also note that the, let's call it's angle phi...