CH_10 Physics - Chapter 10 Rotational Dynamics Units of...

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Chapter 10 Rotational Dynamics
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Units of Chapter 10 Torque Rotational Dynamics; Torque and Rotational Inertia Solving Problems in Rotational Dynamics Angular Momentum and Its Conservation Vector Nature of Angular Quantities
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10-1 Torque To make an object start rotating, a force is needed; the position and direction of the force matter as well. The perpendicular distance from the axis of rotation to the line along which the force acts is called the lever arm .
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10-1 Torque A longer lever arm is very helpful in rotating objects.
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10-1 Torque Here, the lever arm for F A is the distance from the knob to the hinge ; the lever arm for F D is zero ; and the lever arm for F C is as shown.
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10-1 Torque The torque is defined as:
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10-2 Rotational Dynamics; Torque and Rotational Inertia Knowing that , we see that This is for a single point mass; what about an extended object? As the angular acceleration is the same for the whole object, we can write:
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10-2 Rotational Dynamics; Torque and Rotational Inertia The quantity is called the rotational inertia of an object.
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This note was uploaded on 02/25/2012 for the course PHYSICS 1903 taught by Professor Nash during the Spring '10 term at The University of Texas at San Antonio- San Antonio.

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CH_10 Physics - Chapter 10 Rotational Dynamics Units of...

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