Rotation

Rotational energy

Rotational energy or angular kinetic energy is 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, the following dependence on the object's moment of inertia is observed: where is the angular velocity is the moment of inertia around the axis of rotation is the kinetic energy The mechanical work required for or 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 (unattached) 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 (or translational) 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 (if it is massive) to the same as the translational energy (if it is hollow). An example is the calculation of the rotational kinetic energy of the Earth. As the Earth has a sidereal rotation period of 23.93 hours, it has an angular velocity of 7.29×10−5 s−1. The Earth has a moment of inertia, I = 8.04×1037 kg·m2. Therefore, it has a rotational kinetic energy of 2.14×1029 J. Part of the Earth's rotational energy can also be tapped using tidal power. Additional friction of the two global tidal waves creates energy in a physical manner, infinitesimally slowing down Earth's angular velocity ω. Due to the conservation of angular momentum, this process transfers angular momentum to the Moon's orbital motion, increasing its distance from Earth and its orbital period (see tidal locking for a more detailed explanation of this process). (Wikipedia).

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Is It Spinning? We MUST Adjust!!!

Using PHYSICS To Calculate The Rotational Kinetic Energy Of A Sphere!! #Mechanical #Engineering #RotationalMotion #College #NicholasGKK #Shorts

From playlist Mechanical Engineering

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Visit http://ilectureonline.com for more math and science lectures! In this video I will find the total kinetic energy of a rolling solid disk and % of total energy of rotational kinetic energy of a rolling solid disk R=0.3m, M=2kg, and v=10m/s. Next video can be seen at: https://youtu.b

From playlist PHYSICS 8.5 ROTATIONAL KINETIC ENERGY

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Physics 8.5 Rotational Kinetic Energy (2 of 19) Rotating Spoked Wheel

Visit http://ilectureonline.com for more math and science lectures! In this video I will find the rotational kinetic energy of a spoked wheel of R=0.4m, M=5kg, m(spoke)=1kg and omega=4pi rad/s. Next video can be seen at: https://youtu.be/2z4VRu6g6Dw

From playlist PHYSICS 8.5 ROTATIONAL KINETIC ENERGY

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Visit http://ilectureonline.com for more math and science lectures! In this video I will compare rotational K.E. And translational K.E. of a 4kg object spinning at v=2m/s at a radius=1.4m from the center. Next video can be seen at: https://youtu.be/zncdHO5w6tU

From playlist PHYSICS 8.5 ROTATIONAL KINETIC ENERGY

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Visit http://ilectureonline.com for more math and science lectures! In this video I will find the v(final)=? of a m=5kg mass. Next video can be seen at: https://youtu.be/uDbLR3Fz9lo

From playlist PHYSICS 8.5 ROTATIONAL KINETIC ENERGY

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Visit http://ilectureonline.com for more math and science lectures! In this video I will find the rotational kinetic energy of a solid wheel of R=20cm, M=4kg, and omega=5rev/s. Next video can be seen at: https://youtu.be/pKXqE3NNQ18

From playlist PHYSICS 8.5 ROTATIONAL KINETIC ENERGY

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AP Physics 1 review of Torque and Angular momentum | Physics | Khan Academy

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From playlist Review for AP Physics 1 exam | AP Physics 1 | Khan Academy

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From playlist 8.01x - MIT Physics I: Classical Mechanics

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Physics 8.5 Rotational Kinetic Energy (7 of 19) A Solid Disk Rolling in a Circle

Visit http://ilectureonline.com for more math and science lectures! In this video I will find the total K.E. of a solid rolling disk of r=0.3m, m=4kg spinning at omega=2pi rad/s at a radius=2m from the center. Next video can be seen at: https://youtu.be/QEIGdmKf35Y

From playlist PHYSICS 8.5 ROTATIONAL KINETIC ENERGY

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Work (physics) | Rotational spectroscopy | Rigid rotor | Rotation around a fixed axis | Center of mass | Angular momentum | Cylinder | Moment of inertia | Angular velocity