Confused on vectors.

  • Thread starter AryRezvani
  • Start date
  • #1
67
0

Homework Statement



11l1rag.jpg


Homework Equations



x^2 + y^2 = r^2

The Attempt at a Solution



I understand everything, but the last segment.

What vector B when added to vector A, gives a resultant vector with no x component and a negative y component 3.34 units in length?

So 3.34 = Sqr Root [(0^2) + (y^2)]

You get 3.34 again, and because it states the y component should be negative, I plugged in -3.34, but alas, it's wrong. -.-

Ignore the 2.12 that I plugged in on the screenshot, I was just trying different ways of working this out.
 

Answers and Replies

  • #2
Doc Al
Mentor
45,010
1,284
They want the j component of A + B to equal -3.34. Do your values for the j components add to -3.34? (Set up a simple equation and solve for By.)
 
  • #3
67
0
They want the j component of A + B to equal -3.34. Do your values for the j components add to -3.34? (Set up a simple equation and solve for By.)
Thanks.
 

Related Threads on Confused on vectors.

  • Last Post
Replies
5
Views
606
  • Last Post
Replies
2
Views
65K
Replies
1
Views
2K
Replies
1
Views
1K
Replies
4
Views
2K
Replies
8
Views
7K
Replies
4
Views
1K
Replies
9
Views
913
Top