c3

Question 1

features of wing shape

Answer 1

• wing is longer on the top
• air travelling over top of wing must be faster
• wing is shorter on the bottom
• air travelling over bottom = shorter distance

Question 2

consequences of wing shape

Answer 2

• air travelling over top of wing travels at higher velocity
• reduces air pressure on top of wing
• overall there is an upward force on the wing

Question 3

features of spoiler shape

Answer 3

• spoiler is longer on the bottom
• air travelling over the bottom of the spoiler must travel further distance
• spoiler is shorter on the top
• air travelling over top of the spoiler must travel a shorter distance

Question 4

consequences of spoiler shape

Answer 4

• air travelling over bottom of spoiler travels at higher velocity
• reduces air pressure on the bottom of the spoiler
• overall there is a downward force on the spoiler

Question 5

what are the 2 types of the fluid

Answer 5

newtonian + non-newtonian

Question 6

describe newtonian fluid

Answer 6

the viscosity of a newtonian fluid is constant if the temp stays the same. the effect of changing temp on viscosity of a NF is different for gases and liquids

Question 7

newtonian liquids:

Answer 7

as the temp of a newtonian liq increases its viscosity decreases. this is because:
• liquid density decreases
• particles in liq have more energy
• particles have less forces between them
• flow more easily
• flow velocity increases

Question 8

newtonian gases:

Answer 8

as the temp of newtonian gas increases the viscosity increases this is because:
• increase in thermal energy increases collisions between the particles
• increasing the gases resistance to movement

Question 9

what are the 2 types if non-newtonian fluids

Answer 9

shear thickening & shear thinning

Question 10

describe non-newtonian fluids

Answer 10

the viscos of a NNF can change when it is shaken or stirred as well when temp changes. two types of non-newtonian fluids are shear thickening and shear thinning.

Question 11

what is shear thickening

Answer 11

this is when the viscos increases when a shear force is applied (e.g., stirred, shaken or compressed) the particles resist movement

Question 12

what is shear thinning

Answer 12

the viscos decreases when a shear force is applied (e.g., stirred, shaken or compressed) layers of particles slide over eachother more easily

Question 13

state two features of turbulent fluid

Answer 13

high friction and layers of liquid/gas mix together