Physics131_L22WI10

Physics131_L22WI10 - Physics 131 - Mechanics Lecture 22...

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Physics 131 - Mechanics Lecture 22 Chapter 12 March 8 , 2010 Homeyra Sadaghiani [email protected]
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9 1-Mar 19 Work, force, potential energy 11.4-6 (12 P)   3-Mar 20 Conservation of energy, power 11.7-9 (9 P) HW#8   5-Mar 21 Rotational motion, center of mass 12.1-3 (8 P) 10 8-Mar 22 Moment of inertia, Torque, static equilibrium   10-Mar 23 Rotational dynamics, final assessment 12.5-11 (20 P) HW#9   12-Mar R Review   19-Mar FINAL EXAM 11:30 A.M.-1:30 P.M. 3-2137 - Comprehensive Schedule 131.03 11:00-12:00 We are here! 2 October 24, 2010 Physics 131 - Lecture 22
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9 1-Mar 19 Work, force, potential energy 11.4-6 (12 P)   3-Mar 20 Conservation of energy, power 11.7-9 (9 P) HW#8   5-Mar 21 Rotational motion, center of mass 12.1-3 (8 P) 10 8-Mar 22 Moment of inertia, Torque, static equilibrium 12.4-8 (7 P)   10-Mar 23 Rotational dynamics, final assessment 12.5-11 (20 P) HW#9   12-Mar R Review   17-Mar FINAL EXAM 11:30 A.M.-1:30 P.M. 3-2137 - Comprehensive Schedule 131.04 12:00-1:00 We are here! October 24, 2010 3 Physics 131 - Lecture 22
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Rolling Motion and Energy October 24, 2010 4 Physics 131 - Lecture 22
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Rotational Energy A rotating rigid body has kinetic energy because all atoms in the object are in motion. The kinetic energy due to rotation is called rotational kinetic energy. Here the quantity I is called the object’s moment of inertia. The units of moment of inertia are kg m 2 . An object’s moment of inertia depends on the axis of rotation. October 24, 2010 5 Physics 131 - Lecture 22
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October 24, 2010 6 Physics 131 - Lecture 22
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EXAMPLE 12.5 The speed of a rotating rod October 24, 2010 7 Physics 131 - Lecture 22 A 1.0 meter long, 200 g rod is  hinged at one end and connected to  a wall. It is held out horizontally,  then released. What is the speed of  the tip of the rod as it hits the  wall? Assume the hinge is  frictionless. Draw a before and after picture and choose an appropriate coordinate  system.
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EXAMPLE 12.5 The speed of a rotating rod October 24, 2010 8 Physics 131 - Lecture 22
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EXAMPLE 12.5 The speed of a rotating rod October 24, 2010 9 Physics 131 - Lecture 22
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October 24, 2010 Physics 131 - Lecture 22 10 Example: C.M. of a Water Molecule ; .
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This note was uploaded on 10/24/2010 for the course PHY PHYSICS 13 taught by Professor Mylander during the Spring '09 term at Cal Poly Pomona.

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Physics131_L22WI10 - Physics 131 - Mechanics Lecture 22...

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