PHY183-Lecture37

# PHY183-Lecture37 - Midterm 2 The average for Midterm 2 was...

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April 4, 2006 Physics for Scientists&Engineers 1 1 Physics for Scientists & Physics for Scientists & Engineers 1 Engineers 1 Spring Semester 2006 Lecture 37 April 4, 2006 Physics for Scientists&Engineers 1 2 Midterm Midterm 2 ! The average for Midterm 2 was 4.91/9 (55%) ! You should do all 9 problems in Corrections Set 2 ! We will calculate your grade as 0.3*(Corrections Set 2 - Midterm 2) + Midterm 2 Don’t just do the problems you missed, do them all! ! If the average student did all the corrections, he/she would get 6.14/9 (68%) April 4, 2006 Physics for Scientists&Engineers 1 3 Review: Review: ! Angular momentum of a point particle ! Use vector product in definition of torque (axial) vector: ! Angular momentum and torque: ! For rigid objects (and only for them): (constant I) r F ! = " r r r L r p = ! r r r d L dt = r r L I = r r r = I r " April 4, 2006 Physics for Scientists&Engineers 1 4 Quiz 37.1 ! The wheel is rotating rapidly counter clockwise, when you look directly towards the axle. Is the direction of the angular momentum towards you or away from you? A) Towards you (out of screen) B) Away from you (into screen) Front view

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April 4, 2006 Physics for Scientists&Engineers 1 5 Quiz 37.2 ! The wheel is now hung from a rope on the axle so
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## This note was uploaded on 03/19/2008 for the course PHY 183 taught by Professor Wolf during the Spring '08 term at Michigan State University.

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PHY183-Lecture37 - Midterm 2 The average for Midterm 2 was...

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