lecture16 - Exam II Today's lecture will cover Textbook...

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Physics 101: Lecture 16, Pg 1 Today’s lecture will cover Textbook Chapter 8.7-8.9 Exam II
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Physics 101: Lecture 16, Pg 2 Review K rotation = ½ I ω 2 Torque = Force that causes rotation Equilibrium ≈ Σ F = 0 ≈ Σ τ = 0 Today Angular Momentum L = I ω Δ L = 0 if Σ τ = 0
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Physics 101: Lecture 16, Pg 3 Linear Angular Displacement x θ Velocity v ω Acceleration a α Inertia m I KE ½ m v2 ½ I ω 2 N2L F=ma τ = I α Momentum p = mv L = I ω Today
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Physics 101: Lecture 16, Pg 4
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Physics 101: Lecture 16, Pg 5 Wrap fingers of right hand around direction of rotation, thumb gives direction of angular momentum. What is direction of angular momentum for wheel A) Up B) Down C) Left D) Right
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Physics 101: Lecture 16, Pg 6 A disk of mass M and radius R rotates around the z axis with angular velocity ω i . A second identical disk, initially not rotating, is dropped on top of the first. There is friction between the disks, and eventually they rotate together with angular velocity ω f . A) ω f = ω i B) ω f = ½ ω i C) ω f = ¼ ω i ω i z ω f z Wheel rim drop
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First realize that there are no external torques acting on the two-disk system.
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This note was uploaded on 02/05/2012 for the course PHYS 101 taught by Professor Ha during the Spring '11 term at University of Illinois at Urbana–Champaign.

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lecture16 - Exam II Today's lecture will cover Textbook...

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