Common angular velocity
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Re: Common angular velocity
Re: Common angular velocity -- daredvl	Post Reply	Top of thread	Forum

Posted by: swearingen ® 03/30/2006, 10:16:07 Author Profile eMail author Edit

I haven't done the numbers, but obviously that can't be correct. It can't start spinning the other way. And since your initial angular velocity is over 6000 rad/s and the flywheel you are speeding up is heavier and larger than the one doing the work, I expect the delta angular velocity to be greater than 26.28, although we know it well be negative, i.e. less angular velocity than what you started with. Use the momentum equation to get your final angular velocity - pretty straightforward. From that you can get your energy loss. From that, coupled with the time of deceleration, you can get the torque required.

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Re: Common angular velocity
Re: Re: Common angular velocity -- swearingen	Post Reply	Top of thread	Forum

Posted by: zekeman ® 03/31/2006, 00:33:28 Author Profile eMail author Edit

Try conserving angular momentum; time has nothing to do with it. Is this homework? If it is, you have not learned the physics. Pick up a book and read up on angular momentum and Newton's laws. If you are a mechanical engineer or hope to be, you must know this in your sleep.

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Re: Common angular velocity
Re: Re: Common angular velocity -- zekeman	Post Reply	Top of thread	Forum

Posted by: rfox71 ® 04/10/2006, 11:44:46 Author Profile eMail author Edit

Using conservation of Angular Momentum to solve for the resultant speed and Impact/Momentum Principles to find the average applied force: (Units?? I just threw it together =\ Always check your units =)   Modified by rfox71 at Mon, Apr 10, 2006, 11:50:18

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