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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. Power is a scalar quantity.
What is power? Much like energy, the word power is something we hear a lot. In everyday life it has a wide range of meanings. In physics however, it has a very specific meaning. It is a measure of the rate at which work is done (or similarly, at which energy is transferred).
- 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...
The rate at which work is done is referred to as power. A task done quite quickly is described as having a relatively large power. The same task that is done more slowly is described as being of less power. Both tasks require he same amount of work but they have a different power.
Learn about power, the rate of doing work, and its formula, unit, and examples. Find out how to calculate average power and the difference between instantaneous and average power.
- 67 min
Power is the rate at which work is done or the rate at which energy is transfered from one place to another or transformed from one type to another.
Power (w)Device, Event, Phenomenon, Process101 erg/second10human, sounds produced during normal ...0.2931 Btu/hour11 watt, 1 joule/secondLearn how to calculate power, the rate at which work is done or energy is transferred, in physics. Watch a video and see how power depends on force, velocity and displacement, and how to distinguish between average and instantaneous power.
- 6 min
- David SantoPietro
In physics, power is the rate of doing work. It is the amount of energy consumed per unit time. The unit of power is the joule per second (J/s), known as the watt (in honor of James Watt, the eighteenth-century developer of the steam engine).
