About the Mechanics Test

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Presentation transcript:

About the Mechanics Test Test average was 68%. Histogram of marks is posted on the course web-site. You will receive your test in tutorial this week. If you find a mistake in the marking you must notify Dr. Savaria in MP129 before next Friday, November 17 by 5:00PM. This guy is responsible for calculating and submitting your mark!

Test Mark & Using Your Clicker C: Number of classes for which a student answered ¾ or more of the In-Class Questions (maximum 14) C Number of Students Test 1 Average 1 – 8 198 64.2 9 – 11 212 69.8 12 - 14 167 75.0 Only students who registered their clicker appear in the above table

PHY138 – Waves, Lecture 2 Today’s overview Hooke’s Law and Oscillation of Springs Hanging Springs The Pendulum Damped Oscillations; Shock Absorbers Driven Oscillations; Resonance

Reading Assignment Next week’s reading is Knight Chapter 20, Sections 20.1 – 20.7. (We are skipping Chapters 15,16,17,18 and 19.) There is a pre-class quiz on www.masteringphysics.com for Chapter 20 due on Monday morning. A www.masteringphysics.com Problem Set on Chapter 14 is due on Friday at 11:59PM.

Mass on Spring versus Pendulum Mass on a Spring Pendulum Condition for S.H.M. Small oscillations (spring obeys Hooke’s Law) Small angles (sinθ ≈ θ) Natural frequency [rad/s] Period

14.7 Damped Oscillations

14.8 Externally Driven Oscillations Resonance!