3D Moment with force and couple

Fantom
Messages
2
Reaction score
0

Homework Statement


The special-purpoise milling cutter is subjected to the force of 1040 N and a couple of 211 N·m as shown. Determine the moment of this system about point O.
(Let's laugh at the text's typo)

Homework Equations


Mo = R x F + (Couple)

The Attempt at a Solution


I'm having a little difficulty with this... And I'm not sure why... I've done a question with the same question, different numbers and continue to get the right answer.

Anyways...

Mo = (0 - 654.5 * .265)i - (.21 * -808.2)j + (.21 * 654.5)k + <0, 211sin39, -211cos39>

This gave me... <-173i, 302j, -26.5k>

The "302j" is correct, the others are not. Not sure where I went wrong.~~~
Image: http://imgur.com/NB1zpeS
 
on Phys.org
Anyone..?
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
4K
Replies
1
Views
3K
Replies
5
Views
24K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 21 ·
Replies
21
Views
26K
  • · Replies 2 ·
Replies
2
Views
3K
Replies
6
Views
3K
Replies
9
Views
9K