Instantaneous power (dot product) (P = F·v = Fv cos φ)
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P = F·v = Fv cos φ
What each symbol means
| Symbol | What it stands for |
|---|---|
| P | Instantaneous power delivered by the force (W) |
| \phi | Angle between F⃗ and v⃗ |
| \mathbf{F} | Force vector at the instant (N) |
| \mathbf{v} | Velocity of point of application (m/s) |
When to use this
Particle or point of application of force; SI watt = J/s.