Biomechanics

• What is fluid mechanics


  When a body travels through a liquid or gas
• What is drag force

  Slows the body down, acts in opposition to the body
• What is surface drag


  Friction between the surface and fluid
• What is form drag


  Impact of fluid on an object
• What are the factors affecting drag

  The velocity of the body, the cross-sectional area, the shape/ surface of the body
• What is bernoulli principle

  A discus experiences upward lift force - it stays in the air for longer due to horizontal displacement. The more lift force an object has the higher and longer it will stay in the air. Lift occurs due to forces acting upon it
• What are the factors that are involved in horizontal displacement

  Optimum angle of attack - 45 degress. Speed of release and height of release
• What is horizontal displacement

  The shortest distance from the starting point to the finishing point
• If the height of release is higher than the landing height what will the angle of attack be

  Lower than 45 degrees
• What makes a parabolic flight path

  Projectiles with a higher weight force and smaller AR - have tru parabola
• What causes distorted parabola

  Projectiles with a lower mass have a distorted parabloa
• Draw vector components of a parabolic flight path

  =

  
• What is Angular motion


  Refers to the rotation of movements around a fixed point or axis
• What is it called when a force is applied outside of the COM

  Eccentric force
• What is an Eccentric force


  When a force is applied outside of the COM
• What is torque


  The rotational consequences of a force
• What affects Inertia


  The mass of the body and the distribution of mass around an axis
• How do you calculate angular momentum

  Angular momentum = inertia x angular velocity
• If mass is distributed from the axis of rotation what happens to inertia

  It increases
• What occurs when a force is applied further away from the axis of rotation

  Torque increases