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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

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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VARVARA [1.3K]

Answer:

Part a)

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Part b)

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Part c)

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Part a)

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