Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
raulweelz
Group Title
Two wheels of moment of inertia 4 rotate side by side @ of 120rev/min and 240rev/min resp. in d opp directions.If now both d wheels are coupled by means of weightless shaft so that both d wheels now rotate with the common angular speed,find d new speed of rotation..
 11 months ago
 11 months ago
raulweelz Group Title
Two wheels of moment of inertia 4 rotate side by side @ of 120rev/min and 240rev/min resp. in d opp directions.If now both d wheels are coupled by means of weightless shaft so that both d wheels now rotate with the common angular speed,find d new speed of rotation..
 11 months ago
 11 months ago

This Question is Open

aufheben1 Group TitleBest ResponseYou've already chosen the best response.0
assuming angular momentum is conserved, then we first calculate the total angular momentum from the initial conditions (L  angular momentum, I  moment of inertia, w  angular velocity: L=Iw). after attachment both discs rotate with the same angular velocity; this because the rod attaching them forces them to rotate in unison. because they have the same moment of inertia (I) and the same angular velocity (w), they will also have equal angular momentum. this means they split the total in half! one final note: angular velocity is a measurement of rotations per second. thus, we convert the given values: w1=120/60=2 and w2=240/60=4. \[L = Iw\]\[L = 4(2) + 4(4) = 24\] each disc rotates with angular momentum of 12 after the attachment. rearranging: \[w=L/I=12/4=3\] whatcha think?
 11 months ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.