K.E. and P.E. in a Pendulum and Spring

  • Thread starter Haseeb Ali
  • Start date
  • #1
Haseeb Ali
6
0
Can anyone explain the conversion of K.E and P.E during compression and expansion of spring and during the motion of pendulum ?
 

Answers and Replies

  • #2
CWatters
Science Advisor
Homework Helper
Gold Member
10,541
2,315
Start with the pendulum. Which bit don't you understand? Do you know what PE and KE are?
 
  • #3
Haseeb Ali
6
0
Start with the pendulum. Which bit don't you understand? Do you know what PE and KE are?
Yes .. i know that. I just want you to explain the interconversion of K.E and P.E as pendulum moves to and fro ,
 
  • #4
russ_watters
Mentor
21,614
8,737
We're not going to do that. We require our members to put more effort than that into their own learning.
 
  • Like
Likes Haseeb Ali
  • #5
CWatters
Science Advisor
Homework Helper
Gold Member
10,541
2,315
At maximum deflection the bob has maximum Potential Energy. Call that PEmax.

Using Basic trig. you can calculate the bob height and hence the PE at any angle of deflection. Lets call that PE(theta) where theta is the instantaneous angle of deflection.

Then applying conservation of energy...

PE(theta) + KE(theta) = PEmax
or rearrange that to give
KE(theta) = PEmax - PE(theta)

Edit: Sorry russ_watters is right. That's why I haven't calculated PE(theta) for you.
 
  • Like
Likes Haseeb Ali

Suggested for: K.E. and P.E. in a Pendulum and Spring

Replies
17
Views
2K
  • Last Post
Replies
11
Views
2K
  • Last Post
Replies
7
Views
10K
  • Last Post
Replies
1
Views
2K
Replies
4
Views
1K
  • Last Post
Replies
8
Views
4K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
4
Views
1K
Replies
2
Views
7K
Top