Lecture_Notes_for_Section_4.5

# Lecture_Notes_for_Se - MOMENT ABOUT AN AXIS Todays Objectives Students will be able to determine the moment of a force about an axis using a scalar

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MOMENT ABOUT AN AXIS Today’s Objectives : Students will be able to determine the moment of a force about an axis using a) scalar analysis, and b) vector analysis. In-Class Activities : Check Homework Reading Quiz Applications Scalar Analysis Vector Analysis Concept Quiz Group Problem Solving Attention Quiz

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READING QUIZ 1. When determining the moment of a force about a specified axis, the axis must be along _____________. A) the x axis B) the y axis C) the z axis D) any line in 3-D space E) any line in the x-y plane 2. The triple scalar product u • ( r × F ) results in A) a scalar quantity ( + or - ). B) a vector quantity. C) zero. D) a unit vector. E) an imaginary number.
APPLICATIONS With the force F , a person is creating the moment M A . What portion of M A is used in turning the socket? The force F is creating the moment M O . How much of M O acts to unscrew the pipe?

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SCALAR ANALYSIS Recall that the moment of a force about any point A is M A = F d A where d A
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## This note was uploaded on 10/04/2010 for the course ME 214 taught by Professor Lipovetsky during the Summer '06 term at Cal Poly Pomona.

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Lecture_Notes_for_Se - MOMENT ABOUT AN AXIS Todays Objectives Students will be able to determine the moment of a force about an axis using a scalar

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