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ilikephysics2

  • 2 years ago

a Ferris wheel that rotates five times each minute. It carries each car around a circle of diameter 18.0 m. What force (magnitude and direction) does the seat exert on a 53.0-kg child when the rider is halfway between top and bottom?

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  1. Miyuru
    • 2 years ago
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    This question would be more suited in physics section.

  2. ilikephysics2
    • 2 years ago
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    yeah but they hardly ever have physics people on here

  3. theredhead1617
    • 2 years ago
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    Haha

  4. Miyuru
    • 2 years ago
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    |dw:1349189537433:dw|

  5. ilikephysics2
    • 2 years ago
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    yes he can be anywhere it doesn't matter..

  6. ilikephysics2
    • 2 years ago
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    it says in the question 5 times each minute

  7. ilikephysics2
    • 2 years ago
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    i dont know where to start on this one

  8. CliffSedge
    • 2 years ago
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    "..when the rider is halfway between top and bottom?" |dw:1349189927715:dw|

  9. ilikephysics2
    • 2 years ago
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    ok

  10. CliffSedge
    • 2 years ago
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    The resultant is the vector sum of the child's weight (up) and the centripetal force (towards center)

  11. ilikephysics2
    • 2 years ago
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    ok

  12. ilikephysics2
    • 2 years ago
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    and thats for start

  13. CliffSedge
    • 2 years ago
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    Can you convert that 5rpm into a linear speed, or at least an angular velocity in radians per second?

  14. ilikephysics2
    • 2 years ago
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    5/60?

  15. Miyuru
    • 2 years ago
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    nope

  16. CliffSedge
    • 2 years ago
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    That will give you revolutions per second, but you need to convert revolutions to something useful like radians or meters.

  17. ilikephysics2
    • 2 years ago
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    can you do it?

  18. CliffSedge
    • 2 years ago
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    Yes, it's a pretty easy operation, but I think you'll get more satisfaction if you try it yourself.

  19. ilikephysics2
    • 2 years ago
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    I already did try, i couldn't do it

  20. Miyuru
    • 2 years ago
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    Would it be 90m/s

  21. ilikephysics2
    • 2 years ago
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    no idea?

  22. Miyuru
    • 2 years ago
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    May be the answer would be, 5300N clockwise

  23. Miyuru
    • 2 years ago
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    Try posting this in the physics section. Surely you would get an answer.

  24. ilikephysics2
    • 2 years ago
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    how did you get that

  25. Miyuru
    • 2 years ago
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    A mistake it would be 530N Well, the weight of the child is 53 kg gravitational acceleration appro. 10m/s2 then force= mass * acceleration = 53kg* 10m/s2 = 530kg/s2 = 530N

  26. ilikephysics2
    • 2 years ago
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    i think thats wrong

  27. CliffSedge
    • 2 years ago
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    5rpm means 5 times 2π radians per minute. Divide by 60 to get radians/second. Multiply that by the radius of 9m to get linear speed. centripetal acceleration (just like in the last problem you did) is v^2/r.

  28. ilikephysics2
    • 2 years ago
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    i need to get going in about 10 minutes can you show me the steps and what the answer is so i can have a better understanding @CliffSedge

  29. ilikephysics2
    • 2 years ago
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    i got 4.71 after i multiplied it by 9

  30. CliffSedge
    • 2 years ago
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    Ok, that will be your linear speed. Square that and divide by the radius to get centripetal acceleration. Mass times acceleration will give you force. Use mg to find the weight force. The resultant is the vector sum of those two forces. If you don't know how to find resultant vectors, then please go back to your book and study.

  31. ilikephysics2
    • 2 years ago
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    so 388.76? is this correct, i only have 1 attempt left?

  32. ilikephysics2
    • 2 years ago
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    ?

  33. CliffSedge
    • 2 years ago
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    You need magnitude and direction. What is the direction of the force vector?

  34. CliffSedge
    • 2 years ago
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    How did you get 388.76? What are the units of that number?

  35. CliffSedge
    • 2 years ago
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    Did you get 2.467 m/s^2 for the centripetal acceleration?

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