Determine the magnitude of the couple forces F
Vložit
- čas přidán 31. 01. 2017
- Book: amzn.to/2i8HBOO
More videos: www.forthesakeofeducation.com
Become my official student: / daxterbels
Determine the magnitude of the couple forces F so
that the resultant couple moment on the crank is zero.
units are in lb
how do you determine the sign for each one if CCW is +
You use the right hand rule to determine their sign. First, you point your fingers in the same direction as one of the forces in the couple. Then, you curl your fingers towards the other force. If the curl of your fingers matches the direction of rotation that is taken to be positive, then the couple moment is positive. If your fingers curl in the opposite direction, then the couple moment is negative.
Hi, could you please do problem 4-137? Thank you
you are giving moment units to a force
you probably dont care but does anyone know a way to get back into an Instagram account..?
I stupidly forgot the password. I appreciate any assistance you can give me
@Elon Imran Instablaster ;)
@Miller Zaiden Thanks for your reply. I got to the site on google and im in the hacking process atm.
I see it takes a while so I will get back to you later when my account password hopefully is recovered.
@Miller Zaiden it worked and I finally got access to my account again. I'm so happy:D
Thanks so much you really help me out :D
@Elon Imran no problem =)
Wait. At 3:18 @F2 shouldn't it be (5cos45) not 10cos45? You should be calculating distance from O to F2 not F1..?
thnx bro
damn
was really itching for the normal and parallel solution
how do you solve this problem using the idea of couple forces though?
You resolve the couple forces into their components as was done in the beginning of this video. Then, you find the moment arms of these couples. I found it easier to visualize these by redrawing the crank as right triangles on both sides of the base. The point of applications of forces can be placed on the triangles, so the moment arms can be found with trigonometry. You then set up the equation for resultant couple moment of the forces to be zero to find F.
answer is supposed to be 194 lb.
get units right teehee