HomeworkLib
Question

A certain CD has a playing time of 78 minutes. When the music starts, the CD...

A certain CD has a playing time of 78 minutes. When the music starts, the CD is rotating at an angular speed of 4.50×1024.50×102revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.00×1022.00×102 rpm. Find the magnitude of the average angular acceleration of the CD. Express your answer in rad/s².

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Using 1st equation of motion

a = ( w2 - w1) /t

a = (2* 3.14 / 60)* ( 200 - 450) / (78* 60)

a = 5.59 x 10^-3 rad/sec^2

Comment in case any doubt please rate my answer....

0 0
Add a comment
Know the answer?
Add Answer to:
A certain CD has a playing time of 78 minutes. When the music starts, the CD...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A certain CD has a playing time of 80 minutes. When the music starts, the CD...

    A certain CD has a playing time of 80 minutes. When the music starts, the CD is rotating at an angular speed of 4.60×1024.60×102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.20×1022.20×102 rpm. Find the magnitude of the average angular acceleration of the CD. Express your answer in rad/s².

  • A certain CD has a playing time of 68 minutes. When the music starts, the CD...

    A certain CD has a playing time of 68 minutes. When the music starts, the CD is rotating at an angular speed of 5.00 × 10 2 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.30 × 10 2 rpm. Find the magnitude of the average angular acceleration of the CD. Express your answer in rad/s².

  • At the start of a CD it is spinning at a rate of 533 rpm (revolutions...

    At the start of a CD it is spinning at a rate of 533 rpm (revolutions per minute). Just as the CD finishes playing it is spinning at a rate of 241 rpm. While playing, the CD undergoes a constant angular acceleration of -7.65·10-3 rad/s2. Find the angle through which the CD has rotated during its playing time. (in rad) B)Find the playing time.

  • At the start of a CD it is spinning at a rate of 525 rpm (revolutions...

    At the start of a CD it is spinning at a rate of 525 rpm (revolutions per minute). Just as the CD finishes playing it is spinning at a rate of 231 rpm. While playing, the CD undergoes a constant angular acceleration of -7.93·10-3 rad/s2. Find the angle through which the CD has rotated during its playing time. (in rad) Find the playing time. (in s)

  • #49 #74 REAL-WORLD APPLICATIONS 58. A truck with 32-inch diameter wheels is traveling at 59. A...

    #49 #74 REAL-WORLD APPLICATIONS 58. A truck with 32-inch diameter wheels is traveling at 59. A bicycle with 24-inch diameter wheels is traveling at 60 mi/h. Find the angular speed of the wheels in 15 mi/h. Find the angular speed of the wheels in rad/ rad/min. How many revolutions per minute do the min. How many revolutions per minute do the wheels wheels make? make? 60. A wheel of radius 8 inches is rotating 15°/s. What is 61. A wheel...

  • A CD starts from rest and reaches 500 rpm in 1.3 seconds. Find the angular acceleration....

    A CD starts from rest and reaches 500 rpm in 1.3 seconds. Find the angular acceleration. How many radians are completed during this time. Does a CD have constant angular speed or constant linear speed?

  • Exercise 9.20 Constant Part A A compact disc (CD) stores music in a coded pattern of...

    Exercise 9.20 Constant Part A A compact disc (CD) stores music in a coded pattern of tiny pits 107 m deep. The pits are arranged in a track that spirals outward toward the rim of the disc the inner and outer radil of this spiral are 25.0 mm and 58.0 mm, respectively. As the disc spins inside a CD player, the track is scanned at a constant linear speed of 1.25 m/s. What is the angular speed of the CD...

  • A wheel 2.30 m in diameter lies in a vertical plane and rotates about its central...

    A wheel 2.30 m in diameter lies in a vertical plane and rotates about its central axis with a constant angular acceleration of 4.50 rad/s2. The wheel starts at rest at t = 0, and the radius vector of a certain point P on the rim makes an angle of 57.3° with the horizontal at this time. At t = 2.00 s, find the following. (a) the angular speed of the wheel rad/s (b) the tangential speed of the point...

  • 1. When a point on the edge of a DVD (radius 6.0 cm) moves along an...

    1. When a point on the edge of a DVD (radius 6.0 cm) moves along an arc of length 120 cm, through what multiple of π rad does the disk turn? 2. With an angular velocity of 3.4π rad/s, how much time is required to complete 11 complete revolutions? 3. The blades of a kitchen blender rotate counterclockwise at 2.2x10^4 rpm (revolutions per minute) a top speed. It takes the blender 2.1 seconds to reach this top speed after being...

  • The outside diameter of the playing area of an optical Blu-ray disc is 11.75 cm, and...

    The outside diameter of the playing area of an optical Blu-ray disc is 11.75 cm, and the inside diameter is 4.50 cm. When viewing movies, the disc rotates so that a laser maintains a constant linear speed relative to the disc of 7.30 m/s as it tracks over the playing area. 1) What is the average angular acceleration of a Blu-ray disc as it plays an 6.0-h set of movies? (Assume the disk is scanned starting at its inner radius...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT