g A CD is spinning on a CD player. You open the CD player to change out the disk and notice that the CD comes to rest after 15 revolutions w

Question

g A CD is spinning on a CD player. You open the CD player to change out the disk and notice that the CD comes to rest after 15 revolutions with a constant deceleration of 120 r a d s 2 . What was the initial angular speed of the CD

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Kim Cúc 7 months 2021-07-12T11:48:27+00:00 1 Answers 5 views 0

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    2021-07-12T11:50:10+00:00

    Answer:

    \omega_1=150rads/sec

    Explanation:

    From the question we are told that:

    Number of Revolution N=15=30\pi

    Deceleration d= -120 rads/2

    Generally the equation for  initial angular speed \omega_1 is mathematically given by

     \omega_2^2=\omega_1^2 +2(d)(N)

     0=\omega_1^2 +2(-120)(20 \pi)

     \omega_1^2=7200 \pi

     \omega_1=150rads/sec

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