Find mass of skaters

  • Thread starter hinamori88
  • Start date
  • #1

Homework Statement


Two identical ice skaters are holding onto opposite ends of a very long spring with a spring constant of 650 N/m. While spinning in a circle, the skaters frequency of revolution is measured to be 0.85 Hz. What is the mass of the skaters?


Homework Equations


F = kx


The Attempt at a Solution


F = (650 N/m)x ?
 
Last edited:

Answers and Replies

  • #2
ehild
Homework Helper
15,543
1,909
Remember, circular motion is the resultant of two perpendicular SHM with the same frequency and amplitude and phase difference of pi/2.


ehild
 
  • #3
Oh so then u use the equation
f=(1/2∏)√(k/m)
And the m needs to be 2m...ok got it!

Thank you!!
 
  • #4
ehild
Homework Helper
15,543
1,909
No, m is not twice that of one skater-just the opposite.

Both skaters spin along the same circle. The situation is the same for each of them as if there was a pole at the centre, and half of the spring connected to the pole with one end and the other end to the skater. What is the spring constant of a halved spring?

ehild
 

Related Threads on Find mass of skaters

  • Last Post
Replies
1
Views
914
Replies
5
Views
1K
  • Last Post
Replies
1
Views
3K
Replies
4
Views
1K
Replies
7
Views
455
Replies
1
Views
8K
  • Last Post
Replies
3
Views
1K
Replies
1
Views
3K
  • Last Post
Replies
3
Views
1K
Top