March 10th, 2017, 04:37 PM  #1 
Member Joined: Feb 2014 Posts: 84 Thanks: 1  Is this correct?
So here is the question and my attempt. I won't know if I'm right until it's turned in and unfortunately the helpful peers I know are all gone around the country so I need the better next thing. Am I right? 
March 10th, 2017, 05:01 PM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,427 Thanks: 1195 
try again, leaving $\omega_0$ in RPM ... $\omega_f$ will be in RPM. $I_0 \omega_0 = I_f \omega_f$ $(200)(10) = (200 + 25 \cdot 2^2)(\omega_f)$ 
March 10th, 2017, 05:22 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 16,778 Thanks: 1236  
March 11th, 2017, 10:40 AM  #4 
Member Joined: Feb 2014 Posts: 84 Thanks: 1 
first time in my life i woke up and did a math problem........ Should I leave it in rev/min? 
March 11th, 2017, 10:44 AM  #5 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 8,762 Thanks: 607  
March 11th, 2017, 11:20 AM  #6 
Math Team Joined: Jul 2011 From: Texas Posts: 2,427 Thanks: 1195 
You didn't round to two decimal places correctly, so my advice is to put away the friggin' calculator and provide an exact solution ... $\omega_f = \dfrac{20}{3}$ RPM or $\dfrac{2\pi}{9}$ rad/sec you should know the rules for turnin ... we don't. which one is acceptable? 
March 11th, 2017, 01:08 PM  #7 
Member Joined: Feb 2014 Posts: 84 Thanks: 1 
I didn't round at all but I see your point...... I don't know, we did examples that left it in RPM and a few that converted it to Rad/sec. I'll just do both. 

Tags 
correct 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Is this correct?  jiasyuen  Algebra  2  January 21st, 2014 08:49 PM 
are this two correct?  oti5  Algebra  2  March 19th, 2012 01:47 PM 
Which one is correct and why?  rudrax  Algebra  3  June 7th, 2011 10:08 PM 
can anyone tell me if i'm correct  alti  Algebra  2  September 27th, 2009 11:55 AM 
Pick the correct number from the correct group  balste  Advanced Statistics  2  September 3rd, 2009 11:20 AM 