# Definitions for rotational energyro·ta·tion·al en·er·gy

### WiktionaryRate this definition:3.0 / 2 votes

1. rotational energynoun

The kinetic energy of a rotating rigid body otherwise at rest

### WikidataRate this definition:5.0 / 2 votes

1. Rotational energy

The rotational energy or angular kinetic energy is the kinetic energy due to the rotation of an object and is part of its total kinetic energy. Looking at rotational energy separately around an object's axis of rotation, one gets the following dependence on the object's moment of inertia: where The mechanical work required for / applied during rotation is the torque times the rotation angle. The instantaneous power of an angularly accelerating body is the torque times the angular velocity. For free-floating objects, the axis of rotation is commonly around its center of mass. Note the close relationship between the result for rotational energy and the energy held by linear motion: In the rotating system, the moment of inertia, I, takes the role of the mass, m, and the angular velocity, takes the role of the linear velocity, v. The rotational energy of a rolling cylinder varies from one half of the translational energy to the same as the translational energy. As an example, let us calculate the rotational kinetic energy of the Earth. As the Earth has a period of about 23.93 hours, it has an angular velocity of 7.29×10^−5 rad/s. The Earth has a moment of inertia, I = 8.04×10^37 kg·m². Therefore, it has a rotational kinetic energy of 2.138×10^29 J.

### Numerology

1. Chaldean Numerology

The numerical value of rotational energy in Chaldean Numerology is: 2

2. Pythagorean Numerology

The numerical value of rotational energy in Pythagorean Numerology is: 1

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"rotational energy." Definitions.net. STANDS4 LLC, 2024. Web. 20 Jul 2024. <https://www.definitions.net/definition/rotational+energy>.

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##### 1 Comment
Remember the closer the comet gets to the tower the faster it goes around. to tell you the truth god was doing one incredible job of moveing astoroids comets heading toward earth I would see a comet to the south north east and west I thought earth was shure to get waked but over and over god step in its on my videos.

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B occlusive
C ectomorphic
D appellative