1 point You are looking down at a map A vector u with u 3 po

(1 point You are looking down at a map. A vector u with u 3 points north and a vector V with V 4 points northeast. The crossproduct u X V points A south B) northwest C) up D) down Please enter the letter of the correct answer: The magnitude u X V

Solution

To find the direction of uxv we use the Right hand thumb rule

Keep our fingers stretched out along the u vector direction and then fold fingers and fold them so that fingers must move towards v. In doing so the direction of the thumb gives the direction of uxv

This gives the direction of uxv as down

|uxv|=|u||v|sin(t)

t is angle between u and v which is 45 degrees

Hence, |uxv|=3*4 sin(45)=12/sqrt{2}