You are looking down at a map. A vector u with | u | = 10 points north and a vector v with | v | = 10 points n

Question

You are looking down at a map. A vector u with | u | = 10 points north and a vector v with | v | = 10 points northeast. The crossproduct u ×v points:

A) south

B) northwest

C) up

D) down

Please enter the letter of the correct answer:

The magnitude | u ×v | =

Answer 1

I know the first part you can use the right-hand rule.  U is your first vector and the second is V and  counterclock-wise from it, therefore, the vector u x v is pointing down.

I don't know for sure, but I think you can say it's |u||v|sin45 which I think is like 10/root 2

but i'm probably mistaken.

enjoy