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Encyclopedia > Rotational inertia
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Increasing the mass increases the rotational inertia of an object. But the distribution of the mass is more important, ie distributing the mass further from the centre of rotation increases rotational inertia by a greater degree. Rotational Inertia is measured in kilogram metre² (kg m²)


  Results from FactBites:
 
Physics & Biomechanics Glossary: Moment of Inertia (218 words)
The rotational inertia of an object depends on the mass of the object, the shape of the object, and how the mass is distributed throughout the object's shape.
The farther away the mass of an object is from the axis of rotation, the harder it is to swing the object, and the greater the rotational inertia.
The rotational inertia of the skater in the figure increases from left to right as the skater lifts his arms and leg, redistributing more of his mass further from his axis of rotation.
Physics Demonstrations on (1Q) - Rotational Dynamics (5005 words)
The period of a bicycle wheel suspended as a pendulum is measured with the wheel spinning and locked.
A horizontal rotating bicycle wheel is braked to a large frame and the combined assembly rotates slower.
Two flywheels free to rotate about a vertical axis on a bar which is also free to rotate about a vertical axis are coupled in various ways to demonstrate "spin-spin" and "spin-orbit" coupling with and without dissipation.
  More results at FactBites »


 

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