• Support PF! Buy your school textbooks, materials and every day products Here!

How to calculate resultant vector angle?

  • Thread starter euphtone06
  • Start date
22
0
1. A person walks in a path which consists of four straight lines at different angles and lengths as seen in the attached image. http://img253.imageshack.us/img253/244/problemlt5.gif [Broken]
The first part of the problem was to find the resultant displacement which was found to be 512.8. The second part asks what is the direction measured from due west, with counterclockwise being in the positive direction of the person's resultant displacement?


3. The Attempt at a Solution
I am having a hard time understanding what the problem means by measured from due west I found the angle of the typical resultant displacement to be 237.26 degrees but this answer was wrong. Is it simply adding +/- 180 for due west? I am confused
 
Last edited by a moderator:

Answers and Replies

Doc Al
Mentor
44,828
1,084
I am having a hard time understanding what the problem means by measured from due west
For example, if the displacement was due east it would be 180 degrees as measured from due west.
I found the angle of the typical resultant displacement to be 237.26 degrees but this answer was wrong.
What are you measuring your angle with respect to? (From due east, I presume.)
Is it simply adding +/- 180 for due west?
Yes, it's as simple as that. But draw a careful diagram to figure it out.
 
22
0
Yes I measured the angle from due east so 237.26-180= 57.26 would be my answer from due west?
 
Doc Al
Mentor
44,828
1,084
Sounds good to me. (I didn't check your original answer though.)
 

Related Threads for: How to calculate resultant vector angle?

Replies
3
Views
1K
Replies
3
Views
6K
Replies
3
Views
4K
  • Last Post
Replies
1
Views
6K
Replies
9
Views
2K
Replies
7
Views
6K
Replies
1
Views
4K
Replies
5
Views
9K
Top