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damaskus [11]
2 years ago
5

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 r

evolutions with a constant deceleration of 120 r a d s 2 . What was the initial angular speed of the CD
Physics
1 answer:
Umnica [9.8K]2 years ago
7 0

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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