Biomechanics Kinematics Flashcards
rectilinear motion
majority of movements occurs in a straight line
pull up
curvlinear motion
linear motion, motion in same trajectory gymnast dismount
angular motion
body moves along curved path at constant velocity swinging on bars
what is kinematics used for
determine key movements patters such as finding optimal way to swing a golf club
how is the body split up into segments
split up about joints
foot,shank,thigh,pelvis,thorax,hand,forearm,upperarm,head
what is position
location of a body in space at some instant in time
what coordinate system do most labs use
cartesian coordinate system
info on inertial systems data collection
cheap, easy to use, reasonably accurate
info on electromagnetic systems
high precision and accuracy
info on optical systems
full capture, expensive, time consuming
joint angle
relative angle between two segments on each side of joint
segment angle
absolute angle of the segement with respect to the right hand horizontal changes according to orientation of body
what is scalar quantity
can be described by magnitude - mass,speed…
what is vector quantity
have both magnitude and direction - velocity,force…
units for length mass time speed acc
M KG S MS/S M/S^2
