Finding angular acceleration as a function of time.

AI Thread Summary
To find the angular acceleration as a function of time for a fan blade with angular velocity omega_z(t) = gamma - Beta(t)^2, differentiation of the angular velocity function is necessary. The discussion highlights confusion among participants regarding the differentiation process, with one user suggesting that acceleration can be derived from velocity through differentiation. Another participant expresses frustration over previous comments while admitting to errors in their calculations due to integrating instead of differentiating. The conversation emphasizes the importance of correctly applying calculus principles to solve the problem. Ultimately, the key takeaway is the need to differentiate the given angular velocity function to determine angular acceleration.
Trojanof01
Messages
13
Reaction score
0
A fan blade rotates with angular velocity given by omega_z(t) = gamma - Beta(t)^2 .


Calculate the angular acceleration as a function of time.


I don't even know where to begin and my book is all but useless. Any ideas?
 
Physics news on Phys.org
Are you serious?

Here's one idea: differentiate!
 
Well, if this was velocity and accelaration you could think of velocity as dv/dt and acceleration by d²v/dt², from this we could clearly go from one to the other...
 
Hey I'm sorry I'm not a physics genius like you are cepheid. I appreciate the help but I can do without the snide comments. Anyway, I was leaning toward differentiating and I tried it and came out with a wrong answer. Computations were probably inaccurate though.
 
Last edited:
Thanks, my calculus is a bit rusty and I integrated instead of differentiated...
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top