# biomechanics last section

 what does hydrostatic weighting find?  what is the relationship between body fat and body density? uses density measurements to determine body fat there is high statistical correlation with an inverse relationship relative velocity is the velocity of a body with respect to the velocity of something else(comparing 2 different velocities of objects) relative velocity equation VO/F = VO – VF what is drag a resistance force which slows the motion of an object moving through a fluid fluid definition  ex. air or water a substance that flows and/or continuously deformed when acted upon by a shear force viscosity definition  what is it directly proportional to? resistance to deformation density and specific weight bouyancy the fluid force that acts directly upward archimedes principle definiton the buoyant force equals the displaced volume of the body center of volume the point where the objects volume is equally distributed and buoyancy acts what determines floatation? what primarily determines floatation? -buoyancy and weight-density (high density-sink, low density-float) increased buoyancy, decreased weight=float decreased buoyancy, increased weight=sink what is skin friction? how does it affect velocity and what kind of flow does it create? a type of drag that decreases velocity by creating a boundary layer (laminar and turbulent) pressure drag  factors influcencing 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 Bernoulli's Principle regions of high velocity are associated with low pressure  regions of low velocity are associated with high pressure magnus effect 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 Authormiss_bayley ID326737 Card Setbiomechanics last section Descriptionnnon Updated2016-12-13T21:57:15Z Show Answers