biomechanics last section

uses density measurements to determine body fat

there is high statistical correlation with an inverse relationship

• is the velocity of a body with respect to the velocity of something else
• (comparing 2 different velocities of objects)

V_O/F = V_O – V_F

a resistance force which slows the motion of an object moving through a fluid

a substance that flows and/or continuously deformed when acted upon by a shear force

resistance to deformation

density and specific weight

the fluid force that acts directly upward

the buoyant force equals the displaced volume of the body

the point where the objects volume is equally distributed and buoyancy acts

• -buoyancy and weight
• -density (high density-sink, low density-float)

increased buoyancy, decreased weight=float

decreased buoyancy, increased weight=sink

a type of drag that decreases velocity by creating a boundary layer (laminar and turbulent)

pressure differential between the front and back of the body 

• -relative velocity between object and fluid
• -magnitude of pressure gradient 
• -size of surface area thats perpendicular to flow

regions of high velocity are associated with low pressure 

regions of low velocity are associated with high pressure

a change in the trajectory of the spinning object towards the direction of the spin

-low velocity with high pressure (the relative velocities going towards each other) will create lift.

if they go in the same direction, the object lowers