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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.
InClass Activities
:
•
Check Homework
•
Reading Quiz
•
Applications
•
Scalar Analysis
•
Vector Analysis
•
Concept Quiz
•
Group Problem Solving
•
Attention Quiz
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View Full Document 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 3D space
E) any line in the xy 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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View Full Document 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.
 Summer '06
 Lipovetsky
 Statics

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