Module 7 Session Topics Object Rotations Right Hand Rule Rotation Notation Single Rotation Multiple Rotations Equivalent Rotations Object Transformations Rotation A rotation is a turning of an object about a straight line known as the axis of rotation ID: 169930
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Slide1
Rotation of Objects about a Single Axis
Module 7Slide2
Session Topics
Object Rotations
Right
Hand Rule
Rotation Notation
Single Rotation
Multiple Rotations
Equivalent
RotationsSlide3
Object Transformations:
Rotation
A rotation is a turning of an object about a straight line known as the axis of rotation.Slide4
Direction of Rotation
A rotation about an axis can be either positive (counterclockwise) or negative (clockwise)Slide5
Right Hand Rule
If you place the thumb of your
right hand
down the axis of rotation, your fingers will curl in the direction of the rotationSlide6
Arrow Coding
Object Rotations can be designated by arrow coding
A curved
counterclockwise
arrow is a positive rotation
A curved clockwise arrow is a negative rotation
The axis for the rotation is included within the notation
The increment for the rotation is always 90
oSlide7Slide8
For each of the following slides, try to visualize the rotationSlide9
YSlide10
YSlide11
YSlide12Slide13Slide14Slide15
Object Transformations:
Rotation
For multiple rotations about the same axis, use an arrow for
each
rotation of 90º.
X
X
Y
Y
Y
Positive 180° rotation about the x-axis
Negative 270° rotation about the y-axisSlide16Slide17
Object Transformations:
Rotation
Sometimes one set of rotations can be replaced by a simpler set.
Y
Y
Y
is equivalent to
YSlide18Slide19
To visualize a rotation, think about moving the notation to the
positive
end of the axis—the arrow will show you the direction of the rotationSlide20
Course Software…
Work through the
Rotation of
Objects About
a
Single
A
xis
computer module Slide21
Rotation of Objects about a Single Axis Homework …
Complete the following pages in Module 7
rot1-
1
-
3
5 - 6
9 - 10
13 - 14
16 - 18