6.6p_Moments

# 6.6p_Moments - ENGR 211 Lecture 6 Looking at more Fun...

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ENGR 211 Lecture 6 Fall 2007 Civil Engineering Looking at Looking at more more Fun Fun Moments Moments Civil Engineering 2-D way to look at Moment D way to look at Moment • Given by the perpendicular distance, D, between the point and the line of action (which is also the minimum distance.)

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ENGR 211 Lecture 6 Fall 2007 Civil Engineering Take a Moment to Review Take a Moment to Review Civil Engineering Introduce a coordinate system Introduce a coordinate system Resolve into components Resolve into components
ENGR 211 Lecture 6 Fall 2007 Civil Engineering Cross Product Cross Product • Definition: • Properties – It’s a vector – NOT commutative – Associative – Distributive AB (r Fsin ) θ ×= rF e × ≠× Fr a( ) a a × = × r F () ( ) ( ) × += × + × W r F r W Civil Engineering Calculating the Cross Product Calculating the Cross Product Use Cartesian form: Use your calculator, but understand what’s happening: i x i = j x j = k x k = 0 i x j=k; i x k = -j j x i=-k; j x k=i k x i = j; k x j=-i RH rule:

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ENGR 211 Lecture 6 Fall 2007
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## This note was uploaded on 03/15/2009 for the course ENGR 211 taught by Professor Tona during the Spring '09 term at Oregon State.

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6.6p_Moments - ENGR 211 Lecture 6 Looking at more Fun...

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