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In physics, 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. In older works, power is sometimes called activity. Power is a scalar quantity.
- Intensity (physics) - Wikipedia
In physics, the intensity or flux of radiant energy is the...
- Power (physics) - Simple English Wikipedia, the free encyclopedia
In physics, power (symbol: P) is how fast work is done or...
- Power - Wikipedia
Common meanings. Power (physics), meaning "rate of doing...
- Intensity (physics) - Wikipedia
Learn how power is measured in watts and horsepower, and how it relates to work, energy and motion. Explore how to calculate instantaneous, average and peak power, and see applications in electricity and lasers.
- V= instantaneous velocity; Since acceleration and velocity are in the same equation, then the velocity is changing (accelerating) over time, so it...
- If you know how much energy is being converted per unit time, that is all you need to calculate power. Ex. measure the current from the battery in...
- Vinitial is 0, therefore it is 1/2Vfinal
- Hello Alex, In general I would agree. In both cases you end up with joules / time. Watch out for context. It seems each field of study has it's own...
- Area under a power vs. time graph is the equivalent of integrating power with respect to time, which gives work or change in energy. To find averag...
- This is actually a very good way to think about it. Its good to know equations sometimes, but you just solved a rather tricky problem in a very ele...
Electric power is transmitted by overhead lines like these, and also through underground high-voltage cables. Electric power is the rate of transfer of electrical energy within a circuit. Its SI unit is the watt, the general unit of power, defined as one joule per second.
Learn how to define and calculate power in physics, the rate at which work is done or energy is transferred or transformed. Watch an example of two weightlifters and see how power depends on force, velocity and displacement.
- 6 min
- David SantoPietro
Power is the rate of doing work or delivering energy, measured in units such as watts or horsepower. Learn how power is calculated from force, speed, torque and angular speed, and see examples of different types of power sources.
