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akhil009

  • 3 years ago

torque and moment i am really confused b/w these 2 help me out here guyz . another thing when to use which method for direction ? 1. right hand screw rule 2. vector cross product rule it turns out apply both the direction will not be same why ?(ref. a simple beam and a point load acting on transverse plane)

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  1. rajathsbhat
    • 3 years ago
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    both 'torque' & 'moment of force' mean the same thing. As for the second question, all these rules are equivalent---meaning that , regardless of which rule you use, you will get the same direction. It's just a matter of choice, really.

  2. rajathsbhat
    • 3 years ago
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    Any questions?

  3. akhil009
    • 3 years ago
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    for simply supported beam a point load is acting then how do u calculate direction n which method

  4. akhil009
    • 3 years ago
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    by vector cross product rule we have force in -j n distance +i resultant cross product will give k direction means beam will tend to rotate in k hows that possible ?

  5. rajathsbhat
    • 3 years ago
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    |dw:1343126765977:dw| So what is your doubt?

  6. akhil009
    • 3 years ago
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    yes thats right moment will act in k direction n tend to rotate in same but in actual when u apply point load on beam it will tries to rotate in xy plane

  7. akhil009
    • 3 years ago
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    |dw:1343127230930:dw|

  8. akhil009
    • 3 years ago
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    |dw:1343127366588:dw|

  9. rajathsbhat
    • 3 years ago
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    Now, I get it. You think that if the direction of the torque is in the k direction, then it has to rotate in that direction. Am I right?

  10. akhil009
    • 3 years ago
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    yes exactly

  11. rajathsbhat
    • 3 years ago
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    That is where you are mistaken. This needs a long explanation. Can you wait for about 20 minutes while I write & explain to you what the direction of torque means- in paper & upload it?

  12. akhil009
    • 3 years ago
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    thanks for ur help i appreciate it yes why wouldnt i wait

  13. akhil009
    • 3 years ago
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    i will wait thanks in advance

  14. rajathsbhat
    • 3 years ago
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    are you in some kind of a hurry? I ask this because paper just won't do. You cannot explain directions in 3D with them. So I thought I'd make a short video to explain it. It may take me 2 hrs to upload it.

  15. rajathsbhat
    • 3 years ago
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    so is that a yes?

  16. akhil009
    • 3 years ago
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    no i am not in any hurry

  17. rajathsbhat
    • 3 years ago
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    Great. I'll get to work, then. :) I'll post a link here ASAP okay?

  18. akhil009
    • 3 years ago
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    yeah ok

  19. akhil009
    • 3 years ago
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    @rajath dont worry i got the answer to that, see the direction which comes out to be k is direction of normal vector or u can say that axis about which it will rotate its not the sense of rotation

  20. rajathsbhat
    • 3 years ago
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    that's absolutely right, @akhil009, congrats!! :)

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