# Calculating the energy stored in a spring

1. Jan 12, 2010

### lukenichols

1. Calculate the energy stored in the spring when a forceo f 12N is applied (revision
a graph is given (force extension graph and when the force is 12N, the extension is 80mm)

2. f=kx

3. I do not know how to solve this problem and my exam is tomorrow!!!!

2. Jan 12, 2010

### rock.freak667

In the graph of F against x, the force should vary linearly. What does the area under the graph give?

3. Jan 12, 2010

### lukenichols

k, the spring constant?

4. Jan 12, 2010

### rock.freak667

No, the area under the graph would give the product of a force and a distance, which is what?

5. Jan 12, 2010

### lukenichols

is it Newton Metres?
I genuinely am unsure on this topic to be honest

6. Jan 12, 2010

### rock.freak667

Yes Nm, which is also the same as Joule, which is energy. So what does the area give?

7. Jan 12, 2010

### lukenichols

does it give the energy stored in joules?

so i have to calculate the area under the graph from 12N downward?

8. Jan 12, 2010

Yes.