One joule of work is said to be done when:
- Aa force of $1 \, N$ displaces a body by $1 \, cm$
- Ba force of $1 \, N$ displaces a body by $1 \, m$
- Ca force of $1 \, \text{dyne}$ displaces a body by $1 \, m$
- Da force of $1 \, \text{dyne}$ displaces a body by $1 \, \text{cm}$
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