
#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: 26,167

hi freshbox!
the other two always work 



#7
May112, 05:49 AM

P: 284

thank you tinytim for the explanation.



Register to reply 
Related Discussions  
Rotational Motion change angular rotational  Introductory Physics Homework  3  
Rotational Motion/Projectile motion of a ball on a circular ramp.  Introductory Physics Homework  21  
Rigid Body  Linear (Center of Mass) motion/Rotational Motion  Introductory Physics Homework  6  
Rotational Motion: Rotational vs. translational kinetic energy  General Physics  3  
Rotational Motion & Rotational Kinetic Energy  Introductory Physics Homework  5 