**Alexandru M, Year 7 **

Alexandru’s project involved modelling Hooke’s Law equations for spring extension by programming a spring simulation on the Scratch website.

**Hooke’s Law equations for spring extension**

Below are the equations for spring extension under the action of a weight:

**i** = initial length (cm). The initial length is the original length of a spring with no weight applied on it.

**e** = extension per Newton (cm/N). The extension per Newton is how much a spring extends for every Newton added.

**m** = mass (g). Mass is the amount of grams applied to a spring that makes it extend.

**G** = weight (N). Weight is the force of gravity corresponding to a mass. On Earth:

**G** = m * 10

**X** = extension (cm). Extension is how much a spring extends from its initial or previous length.

**X** = G * e

**L** = total length (cm). The total length is the length of the spring when it has been extended.

**L** = i + X

Please click on the link to see my spring simulation on Scratch: https://scratch.mit.edu/projects/91592845/