Overview & IntroductionLecture 1

ME 231: Dynamics

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About 2x106 results onfrom the past two years alone

Question of the Day

What is dynamics & why is it important?

ME 231: Dynamics

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Outline for Today

� Question of the day� Who am I?� Who are you?� What is in the syllabus and handouts?� Context: Why is dynamics important?� Concept: What is dynamics?� Calculation: How do we use dynamics?� Answer your questions!

ME 231: Dynamics

� Question of the day

4ME 231: Dynamics

Who am I?

� Originally from Florida

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5ME 231: Dynamics

Who am I?

� Originally from Florida� B.S. in Engineering Science

from University of Florida in 1996

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6ME 231: Dynamics

Who am I?

� Originally from Florida� B.S. in Engineering Science

from University of Florida in 1996

� Biomedical Engineer for Computer Motion, Inc.

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7ME 231: Dynamics

Who am I?

� Originally from Florida� B.S. in Engineering Science

from University of Florida in 1996

� Biomedical Engineer for Computer Motion, Inc.

� Ph.D. in Mechanical Engineering from University of Florida in 2006

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8ME 231: Dynamics

Who am I?

� Originally from Florida� B.S. in Engineering Science

from University of Florida in 1996

� Biomedical Engineer for Computer Motion, Inc.

� Ph.D. in Mechanical Engineering from University of Florida in 2006

� Postdoc & Engineering Research Associate in Bioengineering at Stanford

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9ME 231: Dynamics

Who am I?

� Originally from Florida� B.S. in Engineering Science

from University of Florida in 1996

� Biomedical Engineer for Computer Motion, Inc.

� Ph.D. in Mechanical Engineering from University of Florida in 2006

� Postdoc & Engineering Research Associate in Bioengineering at Stanford

� Married with two children� Enjoy learning, volleyball,

biking, and being outdoors

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ME 231: Dynamics

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Who are you?

1. Where were you born?2. What is something unique about where

you grew up?3. What sports do you like?4. Why are you taking dynamics?5. What do you want to do after you

graduate?

ME 231: Dynamics

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Outline for Today

� Question of the day� Who am I?� Who are you?� What is in the syllabus and handouts?� Context: Why is dynamics important?� Concept: What is dynamics?� Calculation: How do we use dynamics?� Answer your questions!

ME 231: Dynamics

� Question of the day� Who am I?� Who are you?

13ME 231: Dynamics

What is in the syllabus and handouts?

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14ME 231: Dynamics

What is in the syllabus and handouts?

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15ME 231: Dynamics

What is in the syllabus and handouts?

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16ME 231: Dynamics

What is in the syllabus and handouts?

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17ME 231: Dynamics

What is in the syllabus and handouts?

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Outline for Today

� Question of the day� Who am I?� Who are you?� What is in the syllabus and handouts?� Context: Why is dynamics important?� Concept: What is dynamics?� Calculation: How do we use dynamics?� Answer your questions!

ME 231: Dynamics

� Question of the day� Who am I?� Who are you?� What is in the syllabus and handouts?

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Context: Why is dynamics important?

ME 231: Dynamics

Analyze and optimizeathletic performance

Design ergonomicallysafe environments

Create human andanimal characters

Understand and treat movement disorders

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Context: Exercise & Discussion

clockwise = simple spin counter-clockwise = simple spin

zero product of inertia

Investigating the Spin Motion of the Dynamic Celt

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Context: Exercise & Discussion

clockwise = simple spin counter-clockwise = wobble andspin reversal

negative product of inertia

Investigating the Spin Motion of the Dynamic Celt

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Context: Exercise & Discussion

clockwise = wobble and spin reversal counter-clockwise = simple spin

positive product of inertia

Investigating the Spin Motion of the Dynamic Celt

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Concept: What is dynamics?

ME 231: Dynamics

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Concept: What is dynamics?

ME 231: Dynamics

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Concept: What is dynamics?

ME 231: Dynamics

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Kinematics Kinetics Dynamics

Concept: What is dynamics?

ME 231: Dynamics

Chapters 1, 2, 6 Chapters 3, 5, 7, 8

Relationship among position, velocity, and acceleration

Relationship among forces and acceleration

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F = m a

Calculation: How do we use dynamics?

ME 231: Dynamics

Acceleration. Velocity rate of change with

respect to time

Newton’s 2nd Law of MotionThe acceleration of a particle is proportional to the resultantforce acting on it and is in the direction of this force.

Force. A push or pull exerted on a body, characterized by:� magnitude� direction� point of application

Mass. Measure of the resistance of a body to linear acceleration.

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Outline for Today

� Question of the day� Who am I?� Who are you?� What is in the syllabus and handouts?� Context: Why is dynamics important?� Concept: What is dynamics?� Calculation: How do we use dynamics?� Answer your questions!

ME 231: Dynamics

� Question of the day� Who am I?� Who are you?� What is in the syllabus and handouts?� Context: Why is dynamics important?� Concept: What is dynamics?� Calculation: How do we use dynamics?

29BME 271: Biomechanics of Movement

For Next Time…

� Read Chapter 1� Begin Homework #1 due next week

(8/29)� Read Chapter 2, Sections 2.1 and 2.2