A community for students.
Here's the question you clicked on:
 0 viewing
 one year ago
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..
 one year ago
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..

This Question is Open

aufheben1
 one year ago
Best ResponseYou've already chosen the best response.0assuming 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?
Ask your own question
Sign UpFind more explanations on OpenStudy
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.