Determine the resultant couple moment

  • Thread starter joker2014
  • Start date
  • #1
21
0

Homework Statement



4-70 Two couples act on the beam. If F=125 lb. determine the resultant couple moment.
media%2F385%2F3854ab81-8861-4c80-a860-cad551f28f07%2FphpFDUPHk.png

Homework Equations



M=Fd

The Attempt at a Solution


I know CW is + and CCW is - ...and that is determined in the final answer,
I know the solution is taking Forces times the distance, the solution is M=(200*1.5)+(125cos30*1.25)

question is why are they both positive? when do we consider taking negative instead positive? i've seen other solutions for other questions, where they take negative ... im confused when to take negative or position... so why not -200 or -125 [/B]
 
Last edited:

Answers and Replies

  • #2
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,796
1,670
Are you sure your textbook doesn't explain this? Like mentioning the right hand rule?
 
  • #3
21
0
it didnt, otherwise i wouldnt ask here... you could have did me favor and explained rather than asking me a non sense question.. thank you anyways.
 
  • #4
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,796
1,670

Related Threads on Determine the resultant couple moment

Replies
3
Views
10K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
2
Views
780
Replies
6
Views
1K
Replies
5
Views
10K
Replies
1
Views
3K
Replies
1
Views
4K
Replies
12
Views
11K
Top