What is the Angular Velocity of Two Combined Disks?

AI Thread Summary
The discussion revolves around calculating the angular velocity of two combined disks, where the first disk has mass m1 and spins at an angular velocity omega1, while the second disk has a mass of m2 equal to m1/4 and is dropped onto the first. Participants emphasize the importance of applying the Conservation of Angular Momentum principle to solve the problem. One user expresses uncertainty about the solution and is encouraged to study the relevant concepts before attempting the calculations. The conversation highlights the need for a clear understanding of angular momentum conservation in combined systems. Overall, the thread serves as a guide for approaching the problem methodically.
andrewp7
Messages
4
Reaction score
0

Homework Statement


A disc off a mass m1 is spinning freely at omega1(w1). A second disk of the same radius but smaller mass m2=m1/4 is dropped onto the first , and it sticks. What is the angular velocity of the two disks

The Attempt at a Solution


I honestly have no idea
 
Physics news on Phys.org
I appreciate your honesty. Please read up on on Conservation of Angular Momentum and give it a try, then post again with your relevant equations and an attempt at a solution.
 

Thread 'Errors and significant figures'

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...
View full post »
Thread 'A cylinder connected to a hanging mass'

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...
View full post »

Similar threads

Comparison between two Tippe tops
Replies
1
Views
627
Existential dilemma on angular velocity of a complex rigid body
Replies
25
Views
2K
Perfectly inelastic collision of two moving and rotating disks
Replies
9
Views
2K
What is the Angular Velocity Acquired by a Disk on a Rotating Platform?
Replies
28
Views
4K
Two spinning disks, did I mess up?
Replies
5
Views
2K
Angular Momentum- Conserved or not?
Replies
17
Views
344
Conservation of Energy and Angular Momentum in a Rotating Train-Disk System
Replies
30
Views
3K
System of two wheels of different sizes with an axle through their centers
2
Replies
67
Views
4K
Rubber on a rotating disk (angular velocity, forces)
Replies
6
Views
2K
Find the velocity of a rolling disk at time t
Replies
18
Views
2K

Hot Threads

Recent Insights

Back
Top