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Kinetic Energy of a Rigid Body with Velocity in the xy Plane

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Last modified by
on
Jul 24, 2020, 6:28:07 PM
Created by
on
Jun 26, 2014, 8:02:46 AM
`KE = "m" *( v_x ^2 + v_y ^2)/2+ I_c *( omega_z ^2)/2`
`"Mass"`
`"Instantaneous Velocity's x-component"`
`"Instantaneous Velocity's y-component"`
`"Angular Velocity"`
`"Mass Moment of Inertia About the Normal Axis"`
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4269e980-fd08-11e3-b7aa-bc764e2038f2

Kinetic Energy of a Rigid Body with Motion in the xy Plane

  This equation represents the energy possessed by a rigid body in motion traveling in the xy plane. In this formula, `KE` is a function of mass (`m`), velocity (`v`), mass moment of inertial ('Ic') and angular velocity (`omega`). This equation uses a component of the body's rotation that is normal to the xy plane and thus has component velocities in the x and y directions of the coordinate system.  The rotational element of the kinetic energy is a function of the angular velocity, `omega_z`, wich is perpendicular to the velocity components in the xy plane.

author:  Michael Bartmess

/attachments/4269e980-fd08-11e3-b7aa-bc764e2038f2/KineticEnergyofaRigidBodywithVelocityinthexyPlane-illustration.png

Notes

The kinetic energy of an object is the energy the object possesses due to its motion. It is defined as the energy acquired as a body accelerates from rest to a specified velocity. A body (a mass) maintains its kinetic energy until its velocity changes; for example, when a mass hits another immovable object and comes to a stop, its kinetic energy is transferred to another form of energy such as heat.

In classical mechanics, the kinetic energy of a non-rotating mass traveling at a speed v is `(1/2) *mv^2`. In relativistic mechanics, this model is only a good approximation when the velocity, v, is much less than the speed of light.


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