Angular displacement of the cd is 3.25 rev
Explanation:
The question is incomplete. It is not given what is the maximum angular velocity of the cd.
Here we are going to assume that the maximum angular velocity is:
The motion of the cd is an accelerated angular motion, therefore we can use the following suvat equation:
where:
is the angular displacement of the cd during the time interval t
is the initial angular velocity of the cd
is the final angular velocity
Here we have:
t = 1.36 s
(assuming the cd starts from rest)
Therefore, the angular displacement of the cd during this time is:
And since , we can convert into number of revolutions completed:
Learn more about angular motion:
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