A wheel, starting from rest, rotates with a consta...

Answers ( 1 )

  1. svenja brunner
    svenja brunner
    The wheel starts from rest. Therefore ?o= 0
    Using the equation of motion
                                       ? ? = ?1?t + ( 1/2 )?? t2
                                        ?1 = ? ? / ?t -  (1/2 ) ?? t
    we also knowthat           ?1 = ?o + ?t1
                0r ? ? / ?t -  ( 1/2 ) ??t = ? t1
                       23/ 3 - ( 0.5* 2.7 *3) = 2.7 / t1
                               0r t1 = 1.34s
    b) The angular velocity at the start of the 3sinterval
                                  ?1 = ? ? / ?t -  (1/2 ) ?? t
                                       = 23 / 3 - ( 0.5* 2.7 *3)
                                 ?1 = 3.62 rad /s

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