Lab 2 Key copy

# Lab 2 Key copy - Lab time: ONLINE KNH 381: LAB TWO _ ame:...

This preview shows pages 1–4. Sign up to view the full content.

Lab time: ONLINE KNH 381: LAB TWO _Name: KEY for summer 2010 PHS 381 - Biodynamics RUNNING KINEMATICS/ PROJECTILES, NEWTON'S 2ND LAW, Learning objectives (running kinematics): To increase understanding of displacement, speed, velocity, and acceleration and how they are measured. (background info and equations for this part can be found in chapter 2 of the text book) Problems (running kinematics): What is the maximum horizontal velocity that a runner achieves during a sprint race? Learning objective (N’s 2 nd law, projectiles): To increase understanding of projectiles, Newton's 2nd Law of Motion, and impulse and momentum. Equipment: Force plate (in this case you will be given data from an actual jump on a force plate). RUNNING KINEMATICS Sample data for Activity (stride length and rate): The following stride rate and stride length data were measured between the 60 and 100 m marks of the men's and women's 100 m dash finals in the 1997 World Championships: MEN HEIGHT (m) MASS (kg) STEP LENGTH (m) STEP RATE (step/s) Maurice Greene 1.75 75 2.32 5.00 Dovovan Bailey 1.83 82 2.42 4.64 Tim Montgomery 1.78 69 2.25 4.81 WOMEN HEIGHT (m) MASS (kg) STEP LENGTH (m) STEP RATE (step/s) Marion Jones 1.78 61 2.23 4.68 Zhanna Pintusevich-Block 1.64 62 2.19 4.68 Christine Arron 1.77 64 2.40 4.35

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
PHS 381 – Biodynamics Lab Name _________________________________ Sample data for Activity (100 m dash): The men's and women’s 100 m dash finals at the 1997 World Championships: MEN MAURICE GREENE DONOVAN BAILEY TIM MONTGOMERY position time (sec) time (sec) time (sec) 0 (start) 0 0 0 10 m 1.84 1.92 1.87 20 m 2.88 2.95 2.90 30 m 3.80 3.86 3.83 40 m 4.68 4.73 4.71 50 m 5.55 5.58 5.57 60 m 6.40 6.43 6.43 70 m 7.25 7.28 7.29 80 m 8.11 8.14 8.16 90 m 8.98 9.01 9.04 100 m (finish) 9.86 9.91 9.94 WOMEN MARION JONES ZHANNA PINTUSEVICH- BLOCK CHRISTINE ARRON position time (sec) time (sec) time (sec) 0 (start) 0 0 0 10 m 1.98 1.99 2.06 20 m 3.09 3.11 3.21 30 m 4.11 4.12 4.23 40 m 5.08 5.09 5.21 50 m 6.03 6.03 6.17 60 m 6.97 6.97 7.12 70 m 7.92 7.91 8.08 80 m 8.87 8.87 9.05 90 m 9.84 9.85 10.04 100 m (finish) 10.83 10.85 11.05 Distance (m) Time (sec) Velocity (m/s) 0m – 10m 1.98 sec 10/1.98 = 5.05 m/s 10m – 20m 1.11 sec 10/1.11 = 9.00 m/s 20m – 30m 1.02 sec 10/1.02 = 9.80 m/s 30m – 40m .97 sec 10/.97 = 10.30 m/s 40m – 50m .95 sec 10/.95 = 10.53 m/s 50m – 60m .94 sec 10/.94 = 10.64 m/s 60m – 70 m .95 sec 10/.95 = 10.53 m/s 70m – 80m .95 sec 10/.95 = 10.53 m/s 80m – 90 m .97 sec 10/.97 = 10.31 m/s 90m – 100m .99 sec 10/.99 = 10.10 m/s page 2
PHS 381 – Biodynamics Lab Name _________________________________ Questions: The following 3 questions refer to the 100 m dash for the elite sprinter. (choose one) Which elite sprinter did you choose to analyze and what was his or her average horizontal velocity ( v ) for the whole 100 m? (1pt) MARION JONES a = 0 since horizontal velocity, velocity is constant Xf = Xi + V t Δ X = V t Δ 100m = V (10.83 sec) V = 9.23 m/s What is your best

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 11/10/2011 for the course KNH 381LAB taught by Professor Staff during the Summer '11 term at Miami University.

### Page1 / 9

Lab 2 Key copy - Lab time: ONLINE KNH 381: LAB TWO _ ame:...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online