• Support PF! Buy your school textbooks, materials and every day products Here!

Angular speed uniform rod problem

  • Thread starter tigerlili
  • Start date
  • #1
62
0

Homework Statement



The thin uniform rod in Fig. 10-52 has length 4.0 m and can pivot about a horizontal, frictionless pin through one end. It is released from rest at angle θ = 40° above the horizontal. Use the principle of conservation of energy to determine the angular speed of the rod as it passes through the horizontal position. Assume free-fall acceleration to be equal to 9.83 m/s2.



Homework Equations



i really have no idea where to start this :/

The Attempt at a Solution

 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
Well the question says to use the law of conservation of energy.

Since we are talking energy and rotation, rotational kinetic energy should be in your energy equation.


At the angle of 40 degrees, when just held at that position (such that it is at rest), what type of energy does it possess? When it passes through the horizontal plane, what type of energy does it have?
 
  • #3
62
0
thanks for your help, i actually got it :)
 

Related Threads on Angular speed uniform rod problem

  • Last Post
Replies
8
Views
10K
  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
9
Views
6K
  • Last Post
Replies
6
Views
4K
Replies
1
Views
1K
Replies
15
Views
5K
  • Last Post
Replies
4
Views
4K
  • Last Post
Replies
1
Views
73
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
556
Top