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The Power Formula is used to compute the Power, Resistance, Voltage or current in an electrical circuit. The standard metric unit of power is the Watt. Solved Examples
- Relation Between Torque and Power
The above equation can be rearranged to compute the torque...
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- Vector Projection
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- Sum Of Squares Formula
Regression Sum of Squares Formula. Also known as the...
- Instantaneous Speed Formula
Instantaneous speed is the speed of a particle in the...
- Angle Between Two Vectors Formula
Learn how to find the angle between two vectors. Visit...
- Relation Between Torque and Power
Power in mechanical systems is the combination of forces and movement. In particular, power is the product of a force on an object and the object's velocity, or the product of a torque on a shaft and the shaft's angular velocity. Mechanical power is also described as the time derivative of work.
Learn what is power and how to calculate it using the formula Power = work time. See solved examples of power formula in physics and download the Toppr app for more learning resources.
Power = Work / time. or. P = W / t. The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Thus, a Watt is equivalent to a Joule/second. For historical reasons, the horsepower is occasionally used to describe the power delivered by a machine.
By definition, one watt is equal to one joule of work done per second. So if P represents power in watts, Δ E is the change in energy (number of joules) and Δ t is the time taken in seconds then: P = Δ E Δ t. There is also another unit of power which is still widely used: the horsepower.
- 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...
Power can be expressed in units of watts (W). This unit can be used to measure power related to any form of energy or work. You have most likely heard the term used in relation to electrical devices, especially light bulbs. Multiplying power by time gives the amount of energy.
Learn how to calculate power as energy per unit of time, using different units and formulas. See examples of power in physics, electricity and everyday life.
