Finding vector magnitude

  • Thread starter emma3001
  • Start date
  • #1
42
0
Find a vector whose magnitude is 4 and whose x component is twice its y component.

I know that to calculate magnitude it is r= sqrt (x1 + x2)2 + (y1 + y2)2.

I also know that k(vector)= 4

I just am confused by the components (so x=2y ....)
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
Let a=xi+yj

now |a|=4
so that [itex]4=\sqrt{x^2+y^2}[/itex]...(*)

You are told x=2y...can you use this fact and (*) to help you find x and y now?
 

Related Threads on Finding vector magnitude

  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
1
Views
5K
Replies
2
Views
2K
  • Last Post
Replies
1
Views
1K
Replies
2
Views
6K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
1K
Replies
3
Views
602
Replies
3
Views
5K
Top