Power is defined as the rate at which work is done:
\(P={W\over t}\)
Watt is the unit of power?
Just kidding... the unit of power is the Watt (W), equivalent to J s-1.
kWh is a unit of energy and kW per hour isn´t anything
Key Concepts
Objects with engines convert energy even when travelling at a constant speed, due to the resistive forces acting.
\(P={W\over t}=F{s\over t}=Fv\)
This equation enables us to calculate the power of an object moving at constant speed, v, where F is either the thrust or resistive force.
MY PROGRESS
How much of Power have you understood?