Rotation of a Rigid Object About a Fixed Axis 10 5/25/20151 Hamid...
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Rotation of a Rigid Object About a Fixed Axis 10 03/25/22 1 Hamid Salvdari*[email protected]*salvdari.blogfa .com
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Transcript of Rotation of a Rigid Object About a Fixed Axis 10 5/25/20151 Hamid...
Rotation of a Rigid ObjectAbout a Fixed Axis10
04/18/231 Hamid Salvdari*[email protected]*salvdari.blogfa.com
• A rigid object is one that is nondeformable—that is, it is an object in which the separations between all pairs of particles remain constant.
• In this chapter, we treat the rotation of a rigid object about a fixed axis, which is commonly referred to as pure rotational motion.
04/18/233Hamid [email protected]
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10.1 Angular Displacement, Velocity, and Acceleration
one radian is the angle subtended by an arc length equal to the radius of the arc.
04/18/234Hamid [email protected]
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10.1 Angular Displacement, Velocity, and Acceleration
• When rotating about a fixed axis, every particle on a rigid object rotates through the same angle and has the same angular speed and the same angular acceleration.
04/18/236Hamid [email protected]
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10.2 Rotational Kinematics: Rotational Motion with Constant Angular Acceleration
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10.2 Rotational Kinematics: Rotational Motion with Constant Angular Acceleration
04/18/2310Hamid [email protected]
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10.6 Torque
• The tendency of a force to rotate an object about some axis is measured by a vector quantity called torque (tau).
04/18/2331Hamid [email protected]
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10.7 Relationship Between Torque and Angular Acceleration
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Although each point on a rigid object rotating about a fixed axis may not experience the same
– force, – linear acceleration, – linear speed,
each point experiences the same angular accelerationangular speed
at any instant. Therefore, at any instant the rotating rigid object as a whole is characterized by specific values for
o angular acceleration,o net torque, o angular speed.
04/18/2335Hamid [email protected]
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Solution
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EXAMPLE : Angular Acceleration of a Wheel
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Solution
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10.8 Work, Power, and Energy in Rotational Motion
04/18/2344Hamid [email protected]
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the radial component of F does no work because it is perpendicular to the displacement.
Solution
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