Power

Claimed by Aeze3

This topic covers Power.

The Main Idea

Power is the rate of doing work or the amount of energy consumed over an interval of time.

A Mathematical Model

When a force is applied over a distance in a unit of time, power is calculated by

[math]\displaystyle{ power = \frac{F \Delta r}{\Delta t} }[/math] = \frac{W}{\Delta t}</math> where F is force, Δr is displacement, Δt is the duration of time and W is work.

It then follows that instantaneous power is

[math]\displaystyle{ power = F\cdot v }[/math] where v is velocity.

A Computational Model

How do we visualize or predict using this topic. Consider embedding some vpython code here Teach hands-on with GlowScript

Examples

Be sure to show all steps in your solution and include diagrams whenever possible

Simple

A certain motor is capable of doing 3000 J of work in 12 s. What is the power output of this motor?

[math]\displaystyle{ power = \frac{W}{\Delta t} }[/math] = \frac{3000 J}{11 s} = 250 watts

Connectedness

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History

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See also

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Further reading

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External links

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References

Chabay, Ruth W.; Sherwood, Bruce A. Matter and Interactions, 4th Edition: 1-2. Wiley.