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Physicsboi123
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- Homework Statement
- A 9-kg stone is at rest on top of a spring, which causes it to compress 15cm.
What is the spring constant of the spring?
- Relevant Equations
- Ei=Ef, F=kx, W=mg, Ek=0.5kx^2
Using conservation of energy,
0.5kx^2=mgh=mgx
0.5kx=mg
0.5kx=mg, x=0.15, m=9, g= 9.8
So isn't it k= 1176N/m?
For this problem, I understand that you can't use conservation of energy, but why? There is gravitational potential energy at the top and spring elastic energy at the bottom, and no kinetic energy at both points since it is at rest on top of the spring?
Any help would be much appreciated!
Thanks!
0.5kx^2=mgh=mgx
0.5kx=mg
0.5kx=mg, x=0.15, m=9, g= 9.8
So isn't it k= 1176N/m?
For this problem, I understand that you can't use conservation of energy, but why? There is gravitational potential energy at the top and spring elastic energy at the bottom, and no kinetic energy at both points since it is at rest on top of the spring?
Any help would be much appreciated!
Thanks!
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