biomech

Question 1

kinematics

Answer 1

study of movement WITHOUT forces
(how far fast long)
sit to stand

Question 2

kinetics

Answer 2

study of forces

Question 3

Newtons first law of linear motion

Answer 3

object moves in uniform unless external force applied

Question 4

newtons second law and equation

Answer 4

mass will accelerate proportional to force

f=ma

Question 5

news third law

Answer 5

every action equal /opposite reaction

Question 6

kinematic chain

types

Answer 6

linkage of rigid bodies

open/close

Question 7

open chain

Answer 7

one end is free to move

Question 8

close chain

Answer 8

both ends constrained

Question 9

the relationship between ___ and ___ will dictate motion

Answer 9

internal forces/moments

external forces/moments

Question 10

moments

equation

Answer 10

angular equilvanent of force
turning force
M=f/dt

Question 11

moment arm

Answer 11

perp distance from LOA to AOR

Question 12

newton second law angular motion

equation

Answer 12

inertia will angularly accelerate proportionally to moment arm
EM=Ixa

Question 13

1
2
3 class levers

Answer 13

1 - middle ((Axis)
2- res in middle (resistance)
3- mm in middle (MM)

Question 14

mech advantage

Answer 14

mm arm mm / mm arm resistance

Question 15

Moments cause __ due to ___ when one end of linkage is fixed

Answer 15

angular rotation

linear force production

Question 16

factors when considered mm strength

Answer 16

moment arm

mm length/t relationship

Question 17

factors influencing moment mag

Answer 17

joint

mm strength optimal

Question 18

knee adduction studies show

Answer 18

related to disease severity OA
related to symptoms
related to progression 
predicts treatment success
related tribal BMD
softer

Question 19

clinical implications of adduciotn knee

Answer 19

walk slower
footwear (insoles, cane)
brace
toes out