
#1
Sep2509, 10:32 AM

P: 37

The blades of a fan rotate clockwise at −225 rad/s at medium speed, and −355 rad/s at high speed. If it takes 3.05 seconds to get from medium to high speed, what is the average angular acceleration of the fan blades during this time?
Is the answer (355225)/3.05 = 42.6 rad/s^2 Please work it out and tell me if I did this correctly 



#2
Sep2509, 05:01 PM

Sci Advisor
HW Helper
Thanks
P: 26,167

Hi Ion1776!
(try using the X^{2} tag just above the Reply box ) (apart from the sign) the usual constant acceleration equations apply to angular distance speed and acceleration just as they do to linear distance speed and acceleration … in this case, you can (and did) use v  u = at. 


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