Rotational Kinetics

# Rotational Kinetics - follow the path of the rotating...

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Rotational Kinetics Terms and Formulae Terms Rotational motion - The motion of any object in which every part of the object rotates about a common axis in a circular path. Angular displacement - The angle swept out by the circular motion of a particle. See definition of angular displacement Radians - A unit of measuring an angle. The relation between radians and degrees is as follows: 1 revolution = 2 Π radians = 360 o Average angular velocity - The average rate at which an object rotates in a circular path. See formula. Instantaneous angular velocity - The instantaneous rate at which an object rotates in a circular path. See formula. Angular acceleration - The rate of change of angular velocity. See formula. Right hand rule - The rule by which the direction of a rotational vector can be found: take your right hand, curl your fingers and stick your thumb straight up. If you let the curl of your fingers

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Unformatted text preview: follow the path of the rotating particle or body, your thumb will point in the direction of the angular velocity of the body. Formulae Definition of angular displacement μ = s / r Conversion between radians and degrees 2 Π rad = 1 revolution = 360 o Formula for average angular velocity = Formula for instantaneous angular velocity σ = Formula for angular acceleration α = Kinematic equations for rotational motion • σ f = σ o + αt • μ f = μ o + σ o t + αt 2 • σ f 2 = σ o 2 +2 αμ • μ = ( σ o + σ f ) t Relation of linear and angular displacement s = μr Relation of linear and angular velocity v = σr Relation of tangential and angular acceleration a T = αr Relation of radial acceleration and angular velocity a R = σ 2 r...
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Rotational Kinetics - follow the path of the rotating...

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