Power
Summary
- Definition
- Power is the rate at which work is done (or the rate at which energy is transformed or transferred).
Wherenon-calculus calculus P = ∆W ∆t P = dW dt P = power W = work t = time - Power is also the scalar product of force and velocity.
Wheresimplified non-calculus calculus P = F∥v P = Fv cos θ P = F · v P = power F∥ = component of force parallel to direction of motion F = magnitude of force F = force vector v = magnitude of velocity v = velocity vector θ = angle between force and velocity
- Power is the rate at which work is done (or the rate at which energy is transformed or transferred).
- Units
- The SI unit of power is the watt, named after the 18th century Scottish engineer James Watt.
[W = J/s = kg m2/s3]
- The SI unit of power is the watt, named after the 18th century Scottish engineer James Watt.