Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ksaimouli Group Title

a compact disc has a radius of 6cm if the disc rotates about its central axis at a constant angular speed of 5 rev/s what is the total distance traveled by a point on the rim of the disc 40min

  • one year ago
  • one year ago

  • This Question is Closed
  1. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    when i did \[\omega=\frac{ \theta }{ t }\]

    • one year ago
  2. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    but why? (ur answer)

    • one year ago
  3. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    it did not work

    • one year ago
  4. Shane_B Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    This question doesn't even require physics...it's purely mathematical: First, calculate the circumference of the circle. Then multiply that by 5 since it makes 5 revolutions per second. That will give you how far the dot traveled in 1 second. Then just multiply that times how many seconds are in 40 minutes.

    • one year ago
  5. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Can u show me in physics way

    • one year ago
  6. Vincent-Lyon.Fr Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \(\omega=\frac{ \theta }{ t }\) is ok. You should just be careful to plug in the values in the right units.

    • one year ago
  7. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    but @Vincent-Lyon.Fr i did not get the answer with this equation

    • one year ago
  8. Vincent-Lyon.Fr Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Show us you numbers.

    • one year ago
  9. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\theta=10\pi(2400)\]

    • one year ago
  10. Vincent-Lyon.Fr Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    What the question asks is the DISTANCE travelled, not the angle swept during that time.

    • one year ago
  11. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Distance in rotation is nothing but the angle right?

    • one year ago
  12. Vincent-Lyon.Fr Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    No, distance is distance (in metres), and angle is angle (in radians).

    • one year ago
  13. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so i found theta so can i use s=r theta

    • one year ago
  14. ksaimouli Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    \[s=r \theta\]

    • one year ago
  15. Vincent-Lyon.Fr Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yep and you should find about 4.5 km

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.