
#1
May507, 03:48 PM

P: 177

1. The problem statement, all variables and given/known data
A 5.0 kg, 60cmdiameter disk rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. http://session.masteringphysics.com/...gure_13_72.jpg What is the cylinder's angular velocity when it is directly below the axle? 2. Relevant equations Law of conservation of energy (kinetic and potential of both sides) 3. The attempt at a solution I tried to do this problem using mgy=1/2mv^2 but it didnt work... I know it has something to do with moment of inertia, but do I just add the moment of inertia to the 1/2mv^2 and solve for v? 



#2
May507, 04:24 PM

HW Helper
P: 1,542





#3
May507, 04:34 PM

P: 177

ah ic, i need to use rotational energy...i was treating this as a pendulum but i guess i cant do that haha
lol yea, thats what i meant, i have to use Icm + Md^2 to find it at the pivot point thanks, ill see how it goes 



#4
May507, 04:45 PM

P: 177

Cylinder about side, finding angular velocity....
yo thanks, i got it!



Register to reply 
Related Discussions  
Torque graph; finding angular velocity  Introductory Physics Homework  5  
Finding angular velocity  Introductory Physics Homework  2  
[SOLVED] Problem finding angular velocity... !!  Introductory Physics Homework  2  
Equilibrium of Cylinder with two liquids at either side  Introductory Physics Homework  1  
Rotating cylinder, how long will it take before the angular velocity is halved  Advanced Physics Homework  2 