- #1

Aliasa

- 16

- 1

## Homework Statement

The problem is with part b(ii). This is an A level question so only elementary concepts are to be used.

## Homework Equations

$$E = \frac{1}{2}kx^2 $$

## The Attempt at a Solution

EPE should be max at 0, 0.4, 0.8 since E is a function of $x^2$. However, mark scheme only accepts 0 and 0.8 only. It is my understanding that energy profile of a spring is symmetric under compression and expansion, but if so, why is 0.4 not acceptable?