Sports, Exercise & Health Science HL
18
Chapters
197
Notes
Chapter 1 - Musculoskeletal Anatomy
Chapter 2 - Cardio-Respiratory Exercise Physiology
Chapter 3 - Nutrition & Energy Systems
Chapter 4 - Movement Analysis
Chapter 5 - Skill In Sport
Chapter 6 - Measurement & evaluation of human performance
Chapter 7 - Training to optimize physiological performance
Chapter 8 - Environmental Factors & Performance
Chapter 9 - Non-Nutritional Ergogenic Aids
Chapter 10 - Individual Differences In Sport
Chapter 11 - Motivation In Sport & Exercise
Chapter 12 - Arousal, Anxiety & Performance
Chapter 13 - Psychological Skills Training
Chapter 14 - Overtraining, Stress & Burnout In Adolescent Athletes
Chapter 15 - Physical Activity & Health
Chapter 16 - Nutrition For Sport & Exercise
Chapter 17 - Internal Assessment & Practical Work
Chapter 18 - Perparing For Your Exams
Sports, Exercise & Health Science HL
Chapter 4 - Movement Analysis
Unlock the Secrets of Fluid Dynamics in Sports: Air & Water Resistance Explained
654 words
4 mins read
Last edited on 5th Nov 2024
Table of content
Fluid resistance
- Fluids can be air or water. As objects or bodies move through them, they face resistance.
- Fluid Resistance or Drag opposes the object's motion.
- Drag arises because the object is trying to displace fluid molecules which resist this action.
Types of drag
- Surface Drag
- Caused by the interaction between the object's surface and fluid molecules.
- Affected by
- Object's velocity relative to the fluid (faster objects face more resistance).
- Surface area of the object (larger objects have more interaction).
- Surface texture of the object (smoother surfaces cause less drag).
- Fluid density (denser fluids offer more resistance).
- Form Drag
- Caused by the shape of the object.
- Affected by:
- Object's frontal area (larger frontal area has more resistance).
- Object's shape (streamlined shapes face less resistance, e.g., a rugby ball end-on experiences less drag than a spherical ball).
- Object's velocity relative to the fluid.
- Wave Drag
- Opposing force caused by the object creating waves in the fluid.
- Especially important in water-based sports like swimming, canoeing, rowing, or sailing.
Drag equation
- �=12��⋅�⋅�⋅�2F=21Cd⋅A⋅r⋅v2
- �F is the drag force, ��Cd is the drag coefficient (affected by the shape and surface roughness of the object), �A is the frontal area, �r is the fluid density, �v is the velocity of the object relative to the fluid.
- The drag force is negative because it opposes the direction of motion.
- Drag force increases significantly at higher speeds.
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Sports, Exercise & Health Science HL
Chapter 4 - Movement Analysis
Unlock the Secrets of Fluid Dynamics in Sports: Air & Water Resistance Explained
654 words
4 mins read
Last edited on 5th Nov 2024
Table of content
Fluid resistance
- Fluids can be air or water. As objects or bodies move through them, they face resistance.
- Fluid Resistance or Drag opposes the object's motion.
- Drag arises because the object is trying to displace fluid molecules which resist this action.
Types of drag
- Surface Drag
- Caused by the interaction between the object's surface and fluid molecules.
- Affected by
- Object's velocity relative to the fluid (faster objects face more resistance).
- Surface area of the object (larger objects have more interaction).
- Surface texture of the object (smoother surfaces cause less drag).
- Fluid density (denser fluids offer more resistance).
- Form Drag
- Caused by the shape of the object.
- Affected by:
- Object's frontal area (larger frontal area has more resistance).
- Object's shape (streamlined shapes face less resistance, e.g., a rugby ball end-on experiences less drag than a spherical ball).
- Object's velocity relative to the fluid.
- Wave Drag
- Opposing force caused by the object creating waves in the fluid.
- Especially important in water-based sports like swimming, canoeing, rowing, or sailing.
Drag equation
- �=12��⋅�⋅�⋅�2F=21Cd⋅A⋅r⋅v2
- �F is the drag force, ��Cd is the drag coefficient (affected by the shape and surface roughness of the object), �A is the frontal area, �r is the fluid density, �v is the velocity of the object relative to the fluid.
- The drag force is negative because it opposes the direction of motion.
- Drag force increases significantly at higher speeds.
Unlock the Full Content!
Dive deeper and gain exclusive access to premium files of Sports, Exercise & Health Science HL. Subscribe now and get closer to that 45 🌟