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Biomechanics

CH 11 angular kinematics

QuestionAnswer
angular motion All parts of a body move through the same angle, in the same direction in the same time
Joint or relative angles Angle formed from he long axes of two adjacent body segments
Sentimental angles or absolute angles orientation of a single body segment with a fixed line of reference
Measurement of angular velocity ω = 0f - 0i / Δt = Δ0 / Δt
Radian angle subtended by an Arc = in length to the radius
Arc length r0
Circumference 2 π r
Relationship between linear & angular velocity V = r ω
How do you define angular velocity? Rate of change in the joint velocity ω = Δ ϴ / Δt
Angular acceleration Rate of change in angular velocity α = Δ ω / Δ t
Linear velocity units m/s
Angular velocity units rad/s
Linear acceleration units m/s^2
Angular acceleration units rad/s^2
If Omega is constant... no rate of change (alpha - 0)
Force center of the circle that creates radial acceleration constant velocity = increase acceleration
Centrifugal force reaction from "center-fleeing" force
Centripetal force Keeping rotation "center-seeking"
Created by: rmart11