- #1
xupe33jrm
- 14
- 0
Homework Statement
The force vector FA has a magnitude of 90.0 Newtons and points
due east. The force vector FB has a magnitude of 135 Newtons and
points 75° north of east. Use the graphical method and find the
magnitude and direction of (a) FA - FB (give the direction with respect
to due east) and (b) FB + FA (give the direction with respect
to due west).
The Attempt at a Solution
So confused here. I have tried this all kinds of ways and cannot get the answer the book came up with.
I have tried:
a. R = sqrt((90)^2 + (135)^2) = 162 N
For direction I did tan-1 (135/90) = 56.3 degrees South of east.
B. Same answer just N. of east.
The book sais the answer are 142 N for both and 67 degrees.
Help! I need step by step because I just don't get it. This is not for a homework assignment I am just doing the odds out of the back of the book for practice for our test.