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

This preview shows pages 1–8. Sign up to view the full content.

Physics 101: Lecture 16, Pg 1 Today’s lecture will cover Textbook Chapter 8.7-8.9 Exam II

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
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
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

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Physics 101: Lecture 16, Pg 4
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

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
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
First realize that there are no external torques acting on the two-disk system.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## 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.

### Page1 / 22

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

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online