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Flashcards in force, gravity, and pressure ppt Deck (69):
1

what are the SI unit of measurement

m
kg
s
A
mol
cd.

2

what are the Englinsh comparison to the SI units?

lb
oz
inch
foot
yard
F

3

what are the metric system measurements

mL
kg
cm3

4

In physics what unit of measure is most freq used

SI

5

whats the quanity and unit
m

length
meter

6

whats the quanity and unit
kg

mass
kilogram

7

whats the quanity and unit
s

time
second

8

whats the quanity and unit
A

electric current
ampere

9

whats the quanity and unit
K

temp
kelvin

10

whats the quanity and unit
mol

quanity of a substance
mole

11

whats the quanity and unit
cd

luminosity
candle

12

what is quanity described by a single unit

scalar

13

what are the characteristics of scalar

size/magnitude
mass
temp
length

14

what deals with magnitude and direction

vector

15

what are the characteristics of a vector

displacement
velocity
acceleration
force

16

force is a ______

vector

17

what is a sum of all vectors on a given object?

force (net force)

18

does zero net force constitute zero forces acting upon an object

no

19

what law and who made it?
an object will remain at rest or in motion indefinitely unless a net force act upon it? (inertia)

Newton's
law of motion #1
(inertia)

20

what law and who made it?
force is proportional to a specific mass and an acceleration in a specific direction

Newtons
law of motion #2
(force)

21

what law and who made it?
for each force exerted on one body, there is an equal, but oppositely directed force on some other body interacting with it

Newtons law
Law of motion #3

22

how to remember the laws (just for me you may not like)

1st- you'll remain in motion unless something acts upon you
2nd- the force you are moving is proportional to your mass and acceleration
3rd- while going there is a constant force against you interacting with it

23

explain force when a man is pushing a car!

- man applies 1 force to car
- man applies one force to ground (friction coeff)
-Car applies force to ground (friction Coeff)
-car applies force to man
- gravity applies force to car and man
-molecules in the air applying resistance

24

what is the standard unit of measurement of force

newton

25

equation for force?

force= mass x acceleration

26

Equaion for newton

newton = kg x m / s^2

27

what is a newton in layman's terms

the amount of force required to move one kg of an object one meter per second squared

28

mr. miller is 116kg is that his weight?

no it's his mass

29

what is the difference b/t pounds and kg

pounds are weight
kg is mass

30

weight is a measure of what?

mass in accordence with its gravitational relationship

31

any 2 particles with mass have what between them?

attractional force

32

how do you find gravitational force?

Fg= G [(M1 x M2) / D2]
G=gravitational constant
M1 and M2= mass of 2 objects
D2= distance form central points of each object (squared)

33

what is the gravitational constant?

6.67 x 10^-11 N m^2 / kg^2

34

what does little g mean

gravitational constant for earth

35

what does g=

9.81 ms^2 (m/s/s)
or
32 ft s^2 (ft/s/s)

36

how do you calculate gravitational force (fw)

= g x m
fw = 9.81 ms^2 (m/s/s) or 32 ft s^2 (ft/s/s) x m

37

everything close to the earths surface will fall or accelerate at what rate

9.81 m/s^2

38

every kg of an object has a gravitational force of what

9.81 m/s^2

39

what is the free fall vacume? what are its properties

-weight is the only force acting on the object
-mass of the object does not effect the motion
-shape of the object does not effect the motion
-----All objects fall at the same rate in a vacuum (galileo)

40

what is free fall in the atmosphere? what are the properties?

-weight is the only force acting on the object
- comparing 2 objects, the higher velocity occurs for hreater weight, lower drag coeff (more streamlined), lower gas density (higher altitude), or smaller area
---- objects do not fall at the same rate through the atmosphere----
velocity
gas density
frontal area
drag coeff

41

what are fractions of a newton

dynes

42

forces are measured in newtons, biut when very small forces are being measured what is used?

dynes

43

dynes are measured as (what is there equation)

dynes= gm x cm / s^2

44

in healthcare what is measured as a dynes?

swans pvr and svr

45

what is magnitude only?

scalar

46

what is magnitude and direction

vector

47

force and vector is measured in what?

newtons

48

gravitational force allows for what?

weight measurements

49

What is a measure of a given force dispersed over a specific area

pressure

50

pressure is measured in what?

pascals

51

pressure is inversly proportional to what?

area

52

pressure is directly proportional to what?

force

53

1 pascal is equal to what?

1 n/m^2
1 newton per meter squared

54

when pascals is discussed with pressure
1 N/m^2 will equal what

102 gms/m^2

55

102 gms per square meter (gms/m^2) is a fairly small value so often times kilopascalse are used in the place of pascals!! so
1 N/m^2= 1 pascals so _______ N/m^2 = 1 kilopascal

1000 N/m^2

56

100 KPa (kilopascals) equals?
Atm
BAR
mmHg
Torr
cmH2O
lb/in^2

Atm- 1
BAR- 1
mmHg- 760
Torr- 760
cmH2O-1020
lb/in^2- 14.7
(just remember 1 atm= 760mmHg= 760 torr= 14.7 lbs/in^2)
then memorize the other 2

57

what is a measure of the gravitational pull of the molecules and particles towards the center of the earth?

atm pressure

58

what is teh standard measurement of atm pressure at sealevel?

1 atm

59

Higher the elevation the _______ the atm pressure? and why?

lower
- fewer molecules at higher elevation
- further distance b/t 2 objects

60

the lower the elevation the _________ the atm pressure?

higher
like submerging into the water

61

the presure in a fluid is transferable in an _________ system

enclosed

62

an open fluid system has an _________

equilibrium

63

an open fluid system had an equilibrium so when pressure is applied to this equilibrium the change in height of the fluid can be used to calculate the what?

pressure change ( bp)

64

what is gauge pressure??

the pressure reading of a container of some kind, above and beyond atm pressure

65

what is absolute pressure

the combination of atm pressure an dany pressure above atm pressure

66

what in our practice uses gauge and absolute pressures?

APL valve
downstage regulator
pressure regulators
O2 fail safe
O2 flush valve

67

equation for pressure?

pressure= force / area

68

when force is constant and area increases what happens to pressure?

decreases

69

how is the last 2 slides applied to anesthesia?

the smaller syringe you use the higher pressure u get!!!
and the bigger syringe the less pressure u get!!