OCCRA
Go to Post The person that I would, without a doubt, would like to meet the most is my sanity. - lukevanoort [more]
Home
Go Back   Chief Delphi > Other > Math and Science
CD-Events   CD-Media   CD-Spy   FRC-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #1   Spotlight this post!  
Unread 09-05-2007, 08:31 AM
JoeXIII'007's Avatar
JoeXIII'007 JoeXIII'007 is offline
Perpetually Stunned Speechless
AKA: Joeseph Smith
FRC #0066
Team Role: Alumni
 
Join Date: Feb 2004
Rookie Year: 2001
Location: Ypsilanti, MI (Ann Arbor's shadow)
Posts: 752
JoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond reputeJoeXIII'007 has a reputation beyond repute
Send a message via AIM to JoeXIII'007
Help on calc 3 problem would be incredibly appreciated...

ok... this problem is driving me nuts and I have till tomorrow (9/6/07) to figure it out.

It involves 3 dimensional vector math and dot products.

The task is to "find the magnitude of the projection of the load supporting cable OA (O being origin) onto the positive z-axis" as shown in a figure. The figure displays 3 vectors A, B, and C plus a 4th force vector going down the negative z-axis which is shown to have a force of 1000kg.

Points and their coordinates are as follows:

OA.) (10,5,20)
OB.) (-5,-5,20)
OC.) (5,-5,20)

From there, I am a bit stuck. I know the formula of any projection of u onto v... but it doesnt seem to me it would work in this case, it just doesnt seem right. Trig appears to me to be involved but how to apply it sort of stumps me for some reason.

Any help (hints, strategies, etc.) would be helpful and greatly appreciated... thanks!

-Joe
__________________
Joeseph P. Smith
University of Michigan - Informatics
Reply With Quote
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bias Calc DustinB_3 Programming 2 01-27-2007 11:04 PM
not robotics, but help would be appreciated pryoplasm Electrical 26 06-02-2004 07:14 AM
Would agreements help YOUR team? Alex1072 General Forum 23 03-24-2003 03:02 PM
AP Calc Jeff Waegelin Chit-Chat 10 05-08-2002 09:08 PM


All times are GMT -5. The time now is 10:31 PM.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi