12. We assume the sense of rotation is positive, which (since it starts from rest) means all quantities (angular displacements, accelerations, etc.) are positive-valued. (a) The angular acceleration satisfies Eq. 10-13: 22125 rad(5.0 s)2.0 rad/s .2αα=¡=(b) The average angular velocity is given by Eq. 10-5: ωθavgrad5.0 srad / s.===ΔΔt2550.(c) Using Eq. 10-12, the instantaneous angular velocity at
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.