fluid mechanisms

Question 1

fluid mechnisms definition

Answer 1

study of an object or human body tralleing through any liquid or gas
concerned with movements of liquids and gases

Question 2

2 exampls of dynamic fluid forecs

Answer 2

lift and drag

Question 3

drag force

Answer 3

something that slows you down
drag-resistance force caused by motion of body travelling through a fluid
acts in opposition to direction of motion
negative effect on velocity

produced from air resistance and friction

Question 4

what are the two types of drag

Answer 4

surface drag

form drag

Question 5

surface drag

Answer 5

relates to friction betweeen surface of an object and the fluid environment

Question 6

ways swimmer can reduce surface drag

Answer 6

shaving off body air from arms and torso

speciailised smooth colthing

Question 7

form drag

Answer 7

releates to the impact of the fluid enviroment on an object

Question 8

way swimmer can reduce form drag

Answer 8

wearing streamlined clothing

swimmer has to create the thinnest straightest form as they move through water to decrease form drag

Question 9

factors that reduce and increase drag

Answer 9

velocity of the moving body
greater the veloicty of a fluid, the greater the drag force

cross sectional area of moving body
large crosssectional area increases drag
ways to reduce cross sectional area-crowching low over handlebars
allow them to travel faster

shape and the surface charactiertitcs of moving body
more streamlined aerodynamic shape reduces drag
cyclying, more aerodynamic helmet
with air ducts made to reduce drag
elite swimmers shave off body hair and wear hlaf-body swimsuits
those who do not shave hair wear swimming caps