motion in fluid

Question 1

buoyant force is due to

Answer 1

immersion

Question 2

dynamic force is due to

Answer 2

relative motion in fluid

Question 3

what is the buoyant force

Answer 3

vertical, upward force acting upon and object that is submerged in fluid

is equal to the weight of the volume of fluid displaced by the object

Question 4

what is archimedes principle

Answer 4

a body submerged in a fluid will be buoyed up by a force that is equal in magnitude to the weight of the displaced water.

Question 5

the deeper you are submerge the _ the pressure is

Answer 5

greater and is pushes on you upward, downward and from both side

Question 6

if an object dont weight enough to balance the diff between the upward or downward force what happen

Answer 6

it will accelerates upward and be positive buoyant

Question 7

If the weight of the object is greater than the weight of the water what happen

Answer 7

accelerate downward and be negatively buoyant

Question 8

If the object has the same weight as the displaced water

Answer 8

will have no tendency to either float or sink. This object is said to be neutrally buoyant.

Question 9

archimede principle is based on 2 considerations

Answer 9

weight of object, amount of water displaces

Question 10

what is specific gravity

Answer 10

ratio or density of the substance to the density of water

Question 11

something with a specific gravity of 1.0 or less will float or sink

Answer 11

float

Question 12

where is located the center of buoyancy

Answer 12

superiorly to the center of gravity

Question 13

the line of action of gravitional force througth the center of gravity will be vertically _

Answer 13

downward

Question 14

The line of action of buoyant force through the center of buoyancy will be vertically

Answer 14

upward

Question 15

the perpendicular component is the
the parallel component is the

Answer 15

lift
drag

Question 16

what is the drag force

Answer 16

parallel component of dynamic fluid that act in the opposite direction of a system motion in respect of the fluid

Question 17

what is the lift force

Answer 17

perpendicular component of dynamic fluid force that acts in any direction that is perpendicular to the system motion with respect to the fluid.

Question 18

which force tend to resist motion of the system through the fluid

Answer 18

drag, it tends to slow down the relative velocity of an object

Question 19

the greater the _ in velocity of molecule and the _ the rate of this _ the _ the total drag

Answer 19

greater, faster, decrease, greater

Question 20

what is the form drag

Answer 20

equivalent to the sum of the impact forces resulting from the collisions between the fluid molecules and the object.

Question 21

what is the surface drag

Answer 21

as equivalent to the sum of the friction forces acting between the fluid molecules and the surface of the object

Question 21

what is the surface drag

Answer 21

as equivalent to the sum of the friction forces acting between the fluid molecules and the surface of the object

Question 22

which force tend to change the direction of system motion

Answer 22

lift

Question 23

what create the upward lift

Answer 23

more particule under the object

Question 24

what create the downward lift

Answer 24

more particule above the object

Question 25

lift force is proportionqal to what

Answer 25

the lateral acceleration of the fluid molecules and the mass of the molecules that are deflected.