Notes

Power…

Power – The time rate of doing work is called power.
i.e. Power, P = d W/dt
For a constant force F, the power
P = F × v ⇒ P = Fvcosθ
where, v = Velocity of object, θ is angle between F and v.
It is a scalar quantity. SI unit of power is watt and its practical unit is Horse Power (HP). 1 HP = 746 W