My Math Forum Is this correct?

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 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
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 Originally Posted by The_Ys_Guy Am I right?
It won't spin faster after the child hops on.

 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
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 Originally Posted by The_Ys_Guy first time in my life i woke up and did a math problem........
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 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 turn-in ... we don't. which one is acceptable? Thanks from The_Ys_Guy
 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.

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