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Work

Summary

Work …
- is done whenever a force results in a displacement.
  - The component of the force parallel to the displacement is what matters.
- is the scalar product of force and displacement.
  W = FΔs cos θ
- is the force–displacement path integral.
  W = ⌠
  ⌡ F · ds
Units
- The unit of work is the joule [ J = Nm = kgm²/s² ]
Work–Energy Theorem
- Work is done whenever
  - one system transfers energy to another system (transference) or
  - energy changes from one type to another (transduction).
- Work is the transference or transduction of energy.
  W = ΔE

The Physics Hypertextbook

No condition is permanent.

© 1998–2011 Glenn Elert