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Rotational Motion 
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#1
Apr2812, 07:43 AM

P: 284

Hi guys, I have a few doubts on Rotational Motion and hope someone can help me out.
This 3 formula is for finding angular velocity, angular acceleration and angular displacement right? ω=ωi+αt ω²=ωi²+2αδ δ=ωit+1/2αt² And this 3 formula is for finding the linear velocity/acceleration/displacement in a angular shape? s=rδ v=rω α=rα Thanks. 


#2
Apr2812, 07:48 AM

P: 64

If you have no problems on linear acceleration then then only thing that changes in rotational motion is that u becomes ω , a becomes α , x becomes θ .
In both of your questions , the answer is yes . 


#3
Apr2812, 07:58 AM

P: 284

Thank you ZxcvbnM2000 for the reply.
I want to ask can I use this equation v=rω to find the angular velocity as well? 


#4
Apr2812, 09:00 AM

P: 64

Rotational Motion
yes of course as long as you know the linear velocity and the radius ;p



#5
Apr2812, 09:33 AM

P: 284

Ok thank you for the explanation and help.
Out of topic abit, if a rock is thrown downward from the top of a building, the velocity I can set it as ve or +ve, and usually people set it to +ve for the working to be easier, am I right? 


#6
Apr2912, 03:24 PM

Sci Advisor
HW Helper
Thanks
P: 26,157

hi freshbox!
the other two always work 


#7
May112, 05:49 AM

P: 284

thank you tinytim for the explanation.



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