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Torque and Angular Momentum
by emily esser
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Torque and Angular Momentum

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Torque

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Angular force

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Magnitude

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Point of Application

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not seperate from force

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measured by how effective a given force is at twisting or turning something

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Direction

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Concepts are the same as linear Kinematics

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PR. Solv. rotational Inertia

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If the object consists of a small number of particles calculate the sum

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For simple geometric shapes advance math be used, for simplier use table 8.1

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decompose object into several parts, find the sum of each, and then add them

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move mass parellel to the rotation axis without changing I

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Rotational Inertia

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depends on the location of the rotational axis

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Newton's Second Law for Rotations

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Spinning of torque

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Counterclockwise

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Clockwise

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Problem solving for Lever arms

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Draw a line parallel to the force through the force's point of application

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Draw a line from the rotation axis to the line of action

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the magnitude of the torque is the magnitude of the force times the lever arm

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Determine the algebraic sign of the torque as before

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