Sem 2, 2014 EDUH 1017 Sports Mechanics L1 1

EDUH 1017Sports Mechanics

Unit Coordinator: Helen JohnstonSchool of Physics Room 213

9036 - 9259h.johnston@physics.usyd.edu.au

Sem 2, 2014 EDUH 1017 Sports Mechanics L1 2

Introduction

• Read the Unit Outline carefully!• Lecturers

• Helen Johnston (room 213)• Joe Khachan

• Course notes and lab manual• Reference book:

The Biomechanics of Sports Techniques James G. Hay, Prentice Hall 4th Edition

! ! available from the Co-op Bookshop.

Sem 2, 2014 EDUH 1017 Sports Mechanics L1

Assessments

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Lab work 8 labs, 3cp each 16%

Tutorials 10 tutorials 4%

Assignments 3 (up to 3 students) 5%

eLearning quizzes Weekly 2%

Report proposal 1 page 4%

Report 1500 words 16%

Progressive test (practice test in lab session) 5%

Final exam in exam period 48%

Sem 2, 2014 EDUH 1017 Sports Mechanics L1 4

What is Biomechanics?

• The mechanical basis of biology...and the study of the principles and relations involved.

• The application of mechanical laws to living structures, specifically...the human body.

• The study of the structure and function of biological systems by means of the methods of mechanics.

• ...concerned with the internal and external forces acting on a human body and the effects produced...

Sem 2, 2014 EDUH 1017 Sports Mechanics L1 5

What is ‘Sports Mechanics’ about?

Our aim is to • provide a basic knowledge and understanding of concepts

in mechanics. • introduce the required language and methods using a

context that is both interesting and useful.• introduce basic experimental skills in the measurement of

physical quantities and analysis of experimental data. The course consists of three themes: Walking and Running,

Jumping and Ball Sports. We will examine these three themes in turn with a minimum level of mathematics.

Sem 2, 2014 EDUH 1017 Sports Mechanics L1

Context

• Why do skaters lean into a curve?

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Sem 2, 2014 EDUH 1017 Sports Mechanics L1

Context

• Why do high-jumpers use the “Fosbury Flop”?

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Context

• Why do skaters spin faster when they pull their arms in?

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Sem 2, 2014 EDUH 1017 Sports Mechanics L1 9

Why do you need mechanics? - 1

It’s a (small) part of the HSC syllabus for PDHPE

It helps you understandhow you move

Sem 2, 2014 EDUH 1017 Sports Mechanics L1 10

Why do you need mechanics? - 2

Imagine you’re a PE teacher in a school. You have a field, some kids and you want to run some 100 metre sprint trials and offer advice to students on how to improve their technique.

Draw ‘concept maps’• How do you set up and run the event? What do you need? • To analyse the actual race, what information do you need? How

do you get it?• What ‘physical’ factors affect performance? How can you

measure them? How can you change them?

Sem 2, 2014 EDUH 1017 Sports Mechanics L1 11

Measurement

• What are the units of the measurements?• We use the SI (Système International) units - mks system -

based mostly on • Length - metre (m) • Mass - kilogram (kg)• Time - second (s)• Electric Current - ampere (A)• Temperature - kelvin (K)

• There are also the cgs units, imperial units and ‘US customary’ units

Sem 2, 2014 EDUH 1017 Sports Mechanics L1 12

Each unit is based on a standard - e.g. the metre was defined as one ten millionth of the distance from the equator to the pole through Paris. How is it defined now?

Prefixes:

1012 tera T

109 giga- G

106 mega- M

103 kilo- k

10-1 deci- d

10-2 centi- c

10-3 milli- m

10-6 micro- µ

10-9 nano- n

10-12 pico- p