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Tangential Acceleration and Coefficient of static friction

  1. May 10, 2009 #1
    1. The problem statement, all variables and given/known data
    There's a ride called the Cajun Cliffhanger. it's a rotating drum that rotates and makes you stick to the walls. here's are the infomation

    The diameter is 5.3m
    the speed is 4.2 seconds per rotation at final speed
    it takes 10.1 seconds to reach the final speed
    You have to find out

    Your average tangential acceleration before final speed is reached
    the value of the coefficient of static friction between your clothing and the drum wall
    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. May 10, 2009 #2

    LowlyPion

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    Welcome to PF.

    What are your thoughts on how to approach it?

    What kind of forces do you think will need to be generated to satisfy the problem?
     
  4. May 10, 2009 #3
    well i found out the final velocity is 1.5 m/s
    I think the acceleration at final speed is 0.1m/s2 which i got by using a=(vf-vi)/t which is 1.5m/s/10.1 seconds=0.1m/s2
     
  5. May 10, 2009 #4

    LowlyPion

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    Looks to me like

    ω = 2*π/ T = 6.283 / 4.1

    V = ω *r

    so ...

    a = V / T = 6.283 * r / (4.1 * 10.1)

    Knowing V you can figure the centripetal acceleration and the force available to determine the friction coefficient required.
     
  6. May 10, 2009 #5
    is there a formula or equation for centripetal acceleration?
     
  7. May 10, 2009 #6

    LowlyPion

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  8. May 10, 2009 #7
    ok thanks for that. i have another part of the question also. it says what is your average tangential acceleration before the final speed is reached. how do i find that
     
  9. May 10, 2009 #8

    LowlyPion

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  10. May 10, 2009 #9
    thanks. i got another qustion though
    can you think of something that can be measured that has these forces in it?
    1) a net force
    2) a normal force
    3) work
    4) power
     
  11. May 10, 2009 #10
    still need help
     
  12. May 10, 2009 #11

    diazona

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    A block sliding down a ramp...

    Something tells me you might want to be more specific about what you're asking.
     
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