A spring of force constant `k` is stretched by a small length `x`. Find the work done in stretching it further by a small length `y`.

Explanation

To find the work done in stretching a spring further by a small length \( y \) after it has already been stretched by a length \( x \), we can follow these steps:

### Step 1: Understand the Work Done in Stretching a Spring
The work done \( W \) in stretching a spring is given by the formula:
\[ W = \frac{1}{2} k x^2 \]
where \( k \) is the spring constant and \( x \) is the amount of stretch.
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