Question

A spring has a spring constant of 80 N/m. How much energy is stored in the spring when it is compressed 0.2 m past its natural length?

A. 40 J
B. 12 J
C. 8 J
D. 1.6 J

Answer 1

Divide 80 by 0.2

Answer 2

Medal and make sure to close the question

Answer 3

@mdjjh16 That is wrong. Please don't ask for medals either, especially when your solution is wrong. You can even see that if you divide 80 by 0.2, you'll get 400, which is clearly none of the answer choices.

The energy stored in a spring can be modeled as such:
\[\huge E_{\text{spring}}=\frac{ 1 }{ 2 }k(\Delta x)^2\]
Where k is the spring constant and Δx is the change in distance of the spring due to compression/tension.

Answer 4

I should say, change in length, rather than distance.

Answer 5

So 1.6?

Answer 6

If that is what you get when you plug in those numbers, then yes.