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Finding elastic constant given mass and elongation

  • Thread starter Prio
  • Start date
8
0
1. Homework Statement
I'm doing a lab where a known mass is suspended by a spring. All that is known is the mass of the weight used and the length of the elongation of the spring, and I need to find the elastic potential energy of the spring and the spring constant, K.


2. Homework Equations
(formatted text links aren't clicking for me?)
Elastic PE = 1/2Kx^2--x normally applies to the elongation of the spring though it is extending in the y direction in this case

Gravitational PE = 9.81mh

GPE + EPE = Total PE/KE (energy is assumed to be conserved)


3. The Attempt at a Solution
The problem is I have two variables and no way I can see to substitute for one of them to simplify the equation, so I don't know how to isolate a spring constant or the elastic potential energy.
 

Delphi51

Homework Helper
3,407
10
You need the other spring formula, F = kx.
 
8
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Ah, that should help. is that force found with Mass*g*x?
Thanks for the help thus far.
 

Delphi51

Homework Helper
3,407
10
The F is mass*g.
Solve for k.
 
8
0
lol you're right-- after I thought about it, I realized it was just m*g. I'll be able to finish it up , and now I'm sure you want to get to some more questions so have a good night;)
 

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