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AravindG

  • 4 years ago

doubts on gravitation,mechanical properties etc

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  1. AravindG
    • 4 years ago
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    HI THX FOR CMING ...i hav many doubts so pls stay k?

  2. TuringTest
    • 4 years ago
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    Sure, I'll try

  3. AravindG
    • 4 years ago
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    wow thx

  4. AravindG
    • 4 years ago
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    xplain tangential acceleration and radial acceleration .how to find net acceleration?when are the cases when they become 0 alternatively?

  5. AravindG
    • 4 years ago
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    turing?

  6. TuringTest
    • 4 years ago
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    |dw:1329408300806:dw|the terms are not quite what I'm used to, but radial acceleration is a result of the change in direction of the object:\[a=\frac{v^2}r\]it is because the motion vector changes that we get this acceleration (change in direction always means acceleration is happening) so if the object is moving in a straight line the radial acceleration (I call it centripetal acceleration) is zero

  7. TuringTest
    • 4 years ago
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    this illustrate that the change in direction causes an acceleration because the velocity vector changes|dw:1329408593274:dw|As for tangential acceleration that is a result of the object speeding up or slowing down linearly. if, say, we have an object moving in a circular path we have\[a=\alpha r\]where alpha is the angular acceleration:\[\alpha=\frac{d\omega}{dt}\]So if the angular velocity is changing, the object is experiencing a tangential acceleration.

  8. AravindG
    • 4 years ago
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    k

  9. AravindG
    • 4 years ago
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    so radiall acc does not contribute to change in angular velocity?

  10. AravindG
    • 4 years ago
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    doubt 2:when an apple falls towards earth the earth moves up to meet the apple .is this true xplain?

  11. TuringTest
    • 4 years ago
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    no radial acceleration happens just by virtue of the object turning, tangential means the object is actually speeding up along the direction of motion (circle, line, whatever) Last question: Yes this is true, because the all forces come in action-reaction pairs. Because the earth exerts a force (gravity) on the apple, the apple exerts a gravity force on the earth. The magnitudes of those forces are the same, therefor the earth doesn't move much, but it must theoretically move some.

  12. AravindG
    • 4 years ago
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    hey why does earth move less?

  13. TuringTest
    • 4 years ago
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    because it is more massive, and\[F=ma\]m of the apple is small, and m of the earth is large, so the same force on the apple and earth will cause a much greater acceleration on the smaller mass (the apple) than the earth

  14. AravindG
    • 4 years ago
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    k so a body in uniform circular motion has 0 tangential acceleration?

  15. TuringTest
    • 4 years ago
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    right

  16. AravindG
    • 4 years ago
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    do u know applications of modulus of elasticity?

  17. TuringTest
    • 4 years ago
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    if v1=v2 from one point to the next we have 0 change in tangential velocity, which is tangential acceleration of 0|dw:1329409969038:dw|

  18. TuringTest
    • 4 years ago
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    mmm... I never really studied that stuff much. which modulus are we talking about, young's?

  19. AravindG
    • 4 years ago
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    ya

  20. AravindG
    • 4 years ago
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    turing?

  21. AravindG
    • 4 years ago
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    |dw:1327595834758:dw|

  22. AravindG
    • 4 years ago
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    beam of girder is I shape why?

  23. AravindG
    • 4 years ago
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    srry or girder

  24. TuringTest
    • 4 years ago
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    hmm... not sure I can answer that effectively

  25. AravindG
    • 4 years ago
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    what does product of speed and area give us?

  26. TuringTest
    • 4 years ago
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    not sure I understand what you mean

  27. TuringTest
    • 4 years ago
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    area of what?

  28. AravindG
    • 4 years ago
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    area of crossection of a tube

  29. AravindG
    • 4 years ago
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    and speed of water thriugh it

  30. ash2326
    • 4 years ago
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    Volume of water /second

  31. TuringTest
    • 4 years ago
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    well area times velocity is a constant for an incompressible fluid like water, so when the tube narrows the speed of the water increases. I'm pretty sure they multiply to unit volume passing though the area in question

  32. TuringTest
    • 4 years ago
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    ^oh good, I'm right

  33. AravindG
    • 4 years ago
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    ya hw u got that?

  34. ash2326
    • 4 years ago
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    Speed= distance/ time Area*distance/time Volume/time

  35. TuringTest
    • 4 years ago
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    ...or just looking at units\[v\times A=\frac ms\cdot m^2=\frac{m^3}{s}\]which at least suggests it's volume over time

  36. AravindG
    • 4 years ago
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    k

  37. AravindG
    • 4 years ago
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    hey turing hw long will u be here?

  38. AravindG
    • 4 years ago
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    (Also ash)

  39. AravindG
    • 4 years ago
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    :P

  40. ash2326
    • 4 years ago
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    Aravind won't be able to help you with rotation:( I've completely forgotten about it

  41. TuringTest
    • 4 years ago
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    Mexican holiday today, but I still gotta eat breakfast :P

  42. AravindG
    • 4 years ago
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    i dont need rotation help k i hav some other doubts

  43. AravindG
    • 4 years ago
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    hey turing tell time

  44. ash2326
    • 4 years ago
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    I'll be here for 5 minutes more, have to study

  45. AravindG
    • 4 years ago
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    :P

  46. AravindG
    • 4 years ago
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    me 2 thats y i enquired

  47. TuringTest
    • 4 years ago
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    I'll be here until I get hungry!

  48. AravindG
    • 4 years ago
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    u see i get a lot of doubts wen i study

  49. AravindG
    • 4 years ago
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    i want to make sure smone will be here to help me

  50. AravindG
    • 4 years ago
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    u see i hav imp exams

  51. ash2326
    • 4 years ago
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    Aravind preparing for JEE?

  52. AravindG
    • 4 years ago
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    yes

  53. AravindG
    • 4 years ago
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    nic guess

  54. ash2326
    • 4 years ago
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    I will get my brother to help you some time, he knows much more than me

  55. AravindG
    • 4 years ago
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    so turing can i cm online after smtime with a bunch of doubts pls be here :P

  56. AravindG
    • 4 years ago
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    @ash wow where is he studying ??iwhats his name?>

  57. TuringTest
    • 4 years ago
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    yeah, most likely in an hour or two is good

  58. ash2326
    • 4 years ago
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    He's in IIT Bombay, his name is suyash

  59. AravindG
    • 4 years ago
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    k thx pal i wanna be the topper in the xam pray for me and help me k?

  60. AravindG
    • 4 years ago
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    wow is he there in openstudy?

  61. ash2326
    • 4 years ago
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    ok, i'll surely. He's there but comes very less

  62. AravindG
    • 4 years ago
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    k can u tell him ...its my biggest aim to reach iit pls tell him to come ...i would be glad if he is willing to use skype :P

  63. AravindG
    • 4 years ago
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    ash?

  64. ash2326
    • 4 years ago
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    Aravind G, he can't use skype, he doesn't have laptop but I'll ask him to come. And I'll also try to help you out. You can find me more here

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