Go to Post Yes, an expanded FIRST will look far different than it does today. - GaryVoshol [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rating: Thread Rating: 3 votes, 5.00 average. Display Modes
Prev Previous Post   Next Post Next
  #3   Spotlight this post!  
Unread 25-11-2014, 17:59
dellagd's Avatar
dellagd dellagd is offline
Look for me on the field!
AKA: Griffin D
FRC #2590 (Nemesis) #2607 (The Fighting Robovikings)
Team Role: Mentor
 
Join Date: Sep 2011
Rookie Year: 2011
Location: PA
Posts: 890
dellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond reputedellagd has a reputation beyond repute
Re: Physics Quiz 10

Quote:
Originally Posted by Jared View Post
I'm not sure how friction factors into this. A really wide wheel will have much more turning scrub than a thin or donut shaped wheel.

Here's what I've got so far:
I broke the wheel velocity into two components, one in the direction from the wheel to the center of the bot, and the other perpendicular to this one. The inward pointing one is all lost to friction. The other one has a magnitude of 0.707 * 2 = 1.414 feet/second.

The distance from the center to the wheel is 2.828 feet. This means one rotation is 2*pi*r=17.768 feet. This means it's rotating at 1.414/17.768 = 0.079 rotations per second.

I think I'm missing something eight the friction.
I'm not getting the friction part yet either, though I think you may have miscalculated the radius you used, 2.828 is the distance from wheel to wheel diagonally, making the rotation .159 rev/s. With the friction I'm guessing it will be less than this.
__________________
Check out some cool personal projects in computers, electronics, and RC vehicles on my blog!

2016 MAR DCMP Engineering Excellence Award
2016 MAR Westtown Innovation in Control Award
2016 MAR Hatboro-Horsham Industrial Design Award
2015 Upper Darby District Winners - Thanks 225 and 4460!
2015 Upper Darby District Industrial Design Award
2015 Hatboro-Horsham District Winners - Thanks 2590 and 5407!
2014 Virginia Regional Winners - Thanks so much 384 and 1610, I will never forget that experience!
2014 Virginia Quality Award
2014 MAR Bridgewater-Raritan Innovation in Control Award
2014 MAR Hatboro-Horsham Gracious Professionalism Award
2013 MAR Bridgewater-Raritan Innovation in Control Award
2012 MAR Lenape Quality Award

Last edited by dellagd : 25-11-2014 at 18:15.
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


All times are GMT -5. The time now is 12:46.

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


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi