Flashcards in Test 1 Deck (41)
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vector forces what is a vector
magnitude and direction
1
two vector in the same direction are?
added
2
vetor on a graph
arwow starting at the origin or a rectangular graph
3
throw a ball at some degree what is the vertical component
y is the vertical velocity
4
newtons 2nd law
f = m*a
5
3rd law newton
an object in motion stays in motion
6
define inertia
the tendency of an object to resist a change in state
7
weight hangs from ceiling pull slow what happens
upper string breaks
8
pull fast
lower string breaks
9
car accident you hit the window which of newtons laws
1st law
10
staticcoefficient of friction
until you over come frictionn you wont move
11
biceps muscle what does all the force do
keep the joint fixed and move the load or hand
12
potential energy
stored energy
13
kinetic energy
energy in motion or mass times velocity
14
what is the formula for momentum
mass times velocity
15
define work
force times distance
16
work is not a unit of what?
Power
17
Torque
Force * Distance
18
Torque is what kind of motion
Rotational
19
women's center of gravity
through hips
20
for men the cog is
2 inches higher
21
1st class lever
tertoter
22
2nd class
fulcrom load action wheel barrow
23
3rd order
force in middle biceps
24
What kind of lever is the head
1st order
25
Balance platform
Limits of stability where
inbetween the feet when standing static if you lean forward it moves past toes then you fall
26
Wheel chair stability
in front of the axle
27
Plasticity
bends nd stays bent not broken
28
elasticity
returns to normal
29
fracture
at end of plastic region
30
is bone plastic
no elastic
31
if you jump off a table what prevents muscle tears
tendons (elastic)
32
What causes a spiral fx
spin
33
what protects bone joints
hyaline cartilage
34
diagram stressstrain relation
read it
35
discs elastic?
yes when older they get dehydrated
36
ox across knee rotation should be
over the center of the knee.
37
standing on toes what kind of lever
2nd class
38
is muscle linear or non linear force generator
non linear
39
Pennate is weaker or stronger then long?
Stronger
40
