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anonymous

  • 2 years ago

This is the deal, I have two pulleys with a radii of 10.0in. and 6.00in., and their centers are 40.0 in. apart. If the pulley belt is uncrossed, what must be the length of the belt? Can somebody pull me to the side and please explain this to me, I also have a couple questions about this.

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  1. Jbo11
    • 2 years ago
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    |dw:1383415570075:dw|

  2. Jbo11
    • 2 years ago
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    |dw:1383415705475:dw|

  3. Jbo11
    • 2 years ago
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    if so, here is a great step by step explanation http://frentzandsons.com/Hardware%20References/tofindthebeltlength.htm

  4. anonymous
    • 2 years ago
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    thank-you very much.

  5. Jbo11
    • 2 years ago
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    ok maybe bad example So in this you have two circles, you need to know the equation for the circumference of the circle which is 2pir^2 and use only half because the belt covers only half the circles then add the middle which is 40 but times by two because there's two lengths of it

  6. anonymous
    • 2 years ago
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    before you go any farther, that site you gave to my is great. I've got the belt length needs to be 81.57inches. Did I do it right?

  7. Jbo11
    • 2 years ago
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    I got 131.2

  8. Jbo11
    • 2 years ago
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    so you use the diameters which are twice the radii so 20 and 12 add them, then multiply by 1.6, then add 40 twice

  9. anonymous
    • 2 years ago
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    thats what i did wrong. i put the radii , not the diameter.

  10. Jbo11
    • 2 years ago
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    ah, yup, well as long as you understand the problem, little fixes like that can be checked and fixed

  11. anonymous
    • 2 years ago
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    so how does the equation go??

  12. anonymous
    • 2 years ago
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    2radii + 1/2pie +2length

  13. Jbo11
    • 2 years ago
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    yea

  14. anonymous
    • 2 years ago
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    drum roll please........... I got belt length of 113.5in.

  15. anonymous
    • 2 years ago
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    pellet it's not the same, what did I do wrong?

  16. Jbo11
    • 2 years ago
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    Oh ok your equation should be like (2radii+2radii)*1/2pi+2length

  17. anonymous
    • 2 years ago
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    Would'nt you call that the circumference

  18. Jbo11
    • 2 years ago
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    yup, you are using half the circumference and then adding the length between the two pullys

  19. anonymous
    • 2 years ago
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    half the circumference of each pully, so it be 32radii?

  20. Jbo11
    • 2 years ago
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    yea then times 1/2pi and add 80 gives you 131.2

  21. anonymous
    • 2 years ago
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    thank-you so much.but I'm getting 130.27

  22. anonymous
    • 2 years ago
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    I just recalculated and came up wth 131.2

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