Power
Power is defined as the rate in which energy is transferred or the rate work is done (). It is a scalar quantity with a SI unit of Watt=Joule per second, represented by the letter W.
Since work is equal to force multiplied by displacement, we can further derived the equation power.
Assuming that force applied to parallel to object's direction, cosθ=1, then we get the equation below.
Power can also be expressed as the tangent line of change in energy vs. change in time graph.
- Average power is the power measured over a long period
- Peak power is the maximum value the instantaneous power can have in a particular system over a long period.
- Instantaneous power is the power measured at a given instant in time. If we consider the equation for power P=, then then instantaneous power is the measurement we get t is extremely small.
