Natural vibration - energy method

  • Thread starter luznyr
  • Start date
  • #1
28
0

Homework Statement



the problem is in the attached file, im having trouble with part d and e. cheers. [the answer for B is mr^2(0.5-16/9pi^2)]

Homework Equations





The Attempt at a Solution



i wont upload all my working as i have stuff everywhere but for part d:

i got my answer as 0.5I*(omega^2) + 0.5*m*(r*theta^2+(4r/3pi)^2), using the formula for total kinetic energy as 0.5Iomega^2+0.5mv^2

and part e: mgR(theta.sintheta + costheta - 1)

are these along the right tracks?

Homework Statement





Homework Equations





The Attempt at a Solution

 

Attachments

  • Screen shot 2010-05-06 at 10.15.12 PM.png
    Screen shot 2010-05-06 at 10.15.12 PM.png
    62.9 KB · Views: 446

Answers and Replies

  • #2
2
0
are you sure your question 3 is correct?
 
  • #3
28
0
im not too sure what you mean question three sorry, if by part C, then i'm not too concerned about that for the moment, just part D and E
 
  • #4
2
0
sorry... i mean D
 
  • #5
28
0
i have no idea if either of my answers for d or e are right, hence why i stuck it on here....im just so confused haha
 

Related Threads on Natural vibration - energy method

  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
4
Views
2K
Replies
1
Views
1K
Replies
0
Views
1K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
6
Views
1K
Top