The graph of power vs. time is shown in Figure 13.8. From the figure, it should be seen that the instantaneous power at any time is twice the average power between t = 0 and that time.
Power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second.
Power is defined as the rate of electrical energy dissipated or transferred. Hence. Power is measured in joule per second (J/s) and the unit for power is watt The power of 1 watt means that 1 joule of electrical energy is being dissipated or released in every second.
In this article, we will specifically discuss force versus timegraphs and the area under the curve (impulse), both crucial for your understanding of HSC Physics.
Electrical energy is calculated by multiplying electrical power and time of use. From this equation, it can be determined that a powerful device used during a certain period of time will consume more energy than a device with a less powerful rating used for the same duration.
The relationship is often inverse: For a given amount of energy, higher power means shorter time, and vice versa. Context matters: The specific equations and interpretations of the power-timerelationship depend on the physical system being considered.
In summary, power is the rate at which work is done or energy is transferred per unit time. It is directly proportional to the force applied and the distance over which it is applied, and inversely proportional to the time taken to do the work.
In physics, power (P P) is the rate at which work is done (or energy is transferred) over time (t t). Recall that work is a change in energy, therefore power is the change in energy (E E) over the change in time, or P = Δ E / Δ t P = ΔE /Δt.
Power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second.