Define .joulė..the S.I. unit of work and establish a relationship between the S.I. and C.G.S. units of work.

Explanation

### Step-by-Step Solution

**Step 1: Define Joule as the SI Unit of Work**
- The joule (symbol: J) is defined as the amount of work done when a force of 1 newton (N) displaces an object by 1 meter (m) in the direction of the force.
- Mathematically, this can be expressed as:
\[ 1 \text{ Joule} = 1 \text{ Newton} \times 1 \text{ meter} \]
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