JBPE47

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The Decathlon

• JBPE47
• Heep Yunn School

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Introduction

• Reaction time strength
• ?Main factors affecting ones performance in
  playing sports
• Use Self-developed apparatus to investigate
• ? The reaction time of our extremities
• ? Ways to increase ones strength
• ?easier ways to attain better result

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Experiment 1 Testing reaction time

• Objective
• To verify the claim of the hand being used to
  write and complete most tasks reacts faster than
  the other hand.
• Apparatus
• ? Self-developed program
• ? Specially designed keyboards

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Experiment 1 Testing reaction time
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Flash Programe Reaction Time
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Experiment 1 Testing reaction time

• Section 1 Hands
• Procedures
• Collect at least 8 data for each hand
• Organize the data
• ? Delete the highest and lowest
• ? Calculate the average result

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Experiment 1 Testing reaction time
? 150 participants and over 3000 data were
gathered.
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Experiment 1 Testing reaction time

• Result

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Experiment 1 Testing reaction time

• Analysis

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Experiment 1 Testing reaction time

• Section 2 Feet
• ? 52 participants and over 1000 data were
  gathered.

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Experiment 1 Testing reaction time

• Result
• Analysis

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Experiment 1 Testing reaction time

• Analysis
• Hands
• Does the right hand of a right handed person have
  a shorter reaction?
• ? Misconception!!

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Experiment 2 Increasing pushing force

• Objective
• Find out whether biting on tissue
• (????) can increase ones strength
• Preliminary test
• Step 1 Pull the spring balance
• Step 2 Biting on a piece of tissue,
• pull the spring balance again
• ? Repeat three times

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Experiment 2 Increasing pushing force

• Result

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Experiment 2 Increasing pushing force

• Technical Problem 1
• ? Spring balance
• -max. pulling force 100N
• -the max. reading taken is not accurate

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Experiment 2 Increasing pushing force

• Solution
• ? Force sensor
• Another Technical Problem
• ? Max. loading is only 50N
• What can we do?

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Experiment 2 Increasing pushing force

• Self-developed apparatus
• ? Make use of the lever system
• ? Working principle first class lever

Output load
Input effort
pivot
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Experiment 2 Increasing pushing force

• (Load arm) X (Load force) (Effort arm) X
  (Effort force)
• (10) (reading from force sensor) (1) (applied
  force)
• (10) (50) (1) (applied force)
• Max applied force measured 500N

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Experiment 2 Increasing pushing force
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Experiment 2 Increasing pushing force

• Procedures
• Step 1 Push on the wooden part
• Step 2 Push again biting on tissue
• ? Repeat twice

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In order to get the average value of the pushing
force, we use the Best Fit function
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We manually draw a horizontal line that satisfies
most of the points of the graph
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By ymxc (m0), we get an average reading of the
force
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Experiment 2 Increasing pushing force
? 112 participants and 448 data were analyzed.

• Result

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Experiment 2 Increasing pushing force
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Conclusion

• Make good use of the faster reaction hand or foot
• ? Fencing, football, handball, softball
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• Increase the pushing force by biting on our teeth
• ? Discus, javelin, shot put, softball, handball

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Thank you