PDF Lesson

### Lessons 6: Elastic Potential Energy

One form of stored energy is called elastic potential energy (EPE). Elastic potential energy depends on
two factors: the stiffness of a material called the spring constant (*k*) and the stretch or compression
distance (*x*). Can you find the elastic potential energy of a stretched spring?

### Doing the science

- You must have completed Lesson 2: Bounce Back and have those data available to complete this activity.
- Record your data from Lesson 2 in the appropriate places in Table 1 below
- Use the following formula to calculate the EPE of the spring for each of the two hanging
masses and record your calculation in Table 1.

EPE = ½ x (spring constant) x (change in spring length)^{2}