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Mass spring system - unknown spring constant

  • #1
21
0

Homework Statement

Problem: [/B]
Given the mass spring system solve for k1
Snapshot.jpg

The natural frequency wn = 10 s-1
k1=2k2
m=1kg

Homework Equations


wn=(k/m).5

The Attempt at a Solution



solve for k1

m x w2n =2.5k1
k1 = 40 N/m


Note: I calculate 40 N/m and the solution states 250 N/m. I think I am having a fundamental misunderstanding with mass spring systems.
Snapshot.jpg


 

Answers and Replies

  • #2
Titan97
Gold Member
451
18
Is the pulley mass less?
 
  • #3
21
0
yes, I should have put that in the problem stmt.
 
  • #4
19,782
4,034
Your determination of the overall spring constant is incorrect. The 2.5 should be in the denominator.

Chet
 
  • #5
21
0
Any particular reason?
 
  • #6
19,782
4,034
Any particular reason?
Show us what you did, and I'll show you where you made your error.
 

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