A sailboat is heading due east at 8 mph. The wind appears to blow from the south west (toward the north east – that is 45 degrees north of east) as observed from the sailboat. What is the speed and direction of the wind as observed from the ground?
The Attempt at a Solution
I drew a vector due east with magnitude 8. From the head of the vector I drew another vector at a 45 degree angle. Before I can solve the triangle, don't I need to know the magnitude of the wind?