Does Rotational Kinetic Energy Differ for Objects Like Fans in the Air?

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SUMMARY

The discussion centers on the calculation of rotational kinetic energy for objects like fans operating in air. The formula for rotational kinetic energy is confirmed as ½Iω², where I represents the moment of inertia and ω is the angular velocity. It is emphasized that the moment of inertia must be determined based on the specific shape of the fan blades. The kinetic energy of a fan in motion is primarily rotational, and it is noted that the rotational kinetic energy is relevant only when the fan is at rest.

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  • Understanding of rotational kinetic energy concepts
  • Familiarity with the formula ½Iω²
  • Knowledge of moment of inertia and its calculation
  • Basic principles of angular motion
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Physics students, mechanical engineers, and anyone interested in the dynamics of rotating objects, particularly in applications involving fans and similar devices.

kmikias
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Hi I have some question on rotational kenitic energy.here is my question

If something rolling motion the total kinetic energy is the translation kinetic energy and the rotational kinetic
Energy.where I am confuse is what if something rotating in the air like a fan,air conditioner
What would be the kinetic energy would that be 1/2Iw^2...for circle.
 
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Your fan blades would have rotational kinetic energy only if the fan is at rest.

And yes that would be ½Iω².

Determining the moment of inertia would be your only problem depending on the shape of the blade.
 

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