B.2.2 Fluid mechanics
Flashcards for B.2.2 Fluid mechanics - IB
These interactive flashcards help IB Sports, exercise and health science (SEHS - Old) students Standard Level (SL) and Higher Level (HL) quickly review and memorize the essential definitions, formulas, and terms needed for success in IB Exams. Each card focuses on B.2.2 Fluid mechanics and is aligned with the IB Sports, exercise and health science (SEHS - Old) syllabus, ensuring focused revision on core principles, advanced applications, and practical problem-solving. Students can test themselves anytime, anywhere, perfect for reinforcing tricky concepts, learning IB terminology, and committing formulas to memory. By using RevisionDojo's flashcards consistently, learners turn repetition into mastery and enter the exam with confidence.
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What is fluid mechanics?
The study of fluids (liquids and gases) and the forces acting on them, crucial for understanding sports performance.
All flashcards
What is fluid mechanics?
The study of fluids (liquids and gases) and the forces acting on them, crucial for understanding sports performance.
What does the Bernoulli principle state?
As the speed of a fluid increases, its pressure decreases, and vice versa.
How does backspin affect a golf ball?
It creates a pressure difference that generates lift, allowing the ball to stay in the air longer.
What is surface drag?
Also known as skin friction drag, it occurs when fluid molecules interact directly with the surface of an object.
How can swimmers reduce surface drag?
By shaving skin and using specialized swimsuits with shark-skin-like textures.
What is form drag?
Drag resulting from the shape of an object moving through a fluid, increasing dramatically with speed.
How does speed affect form drag?
Form drag increases with the square of the speed; doubling speed quadruples the drag.
What are some ways athletes can reduce form drag?
By adopting streamlined positions, using aerodynamic designs, and minimizing frontal area.
What is wave drag?
Drag specific to activities at the interface between two fluids, such as air and water.
How do swimmers reduce wave drag?
By staying underwater after dives and turns to avoid surface disturbance.
What factors affect drag?
Fluid viscosity, surface characteristics, and relative velocity.
How does fluid viscosity affect drag?
Thicker fluids create more drag; water is about 800 times more viscous than air.
What is the relationship between drag and relative velocity?
Drag is proportional to the square of the velocity: .
What common mistake do people make regarding speed and drag?
Many assume doubling speed doubles drag, but it actually quadruples the drag force.
How do cyclists reduce drag?
By using aerodynamic helmets, adopting a dropped handlebar position, and wearing tight-fitting clothing.
What techniques do swimmers use to optimize performance?
Streamlined body positions, technical suits, and underwater phases during starts and turns.
What strategies do athletes use in winter sports to reduce drag?
Tucked positions in skiing, aerodynamic suits in ski jumping, and streamlined helmets in speed skating.
What should be considered when analyzing drag in sports?
The medium (air/water), speed of movement, surface area exposed, and shape of the athlete/equipment.