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    Swinging bob

    Thanks!! Wow, it all seems to fall into place now.
  2. N

    Swinging bob

    Thanks for the replies! Dadface, Thus, ((mv^2)/r)sinx = mg. Even if it is agreed that perfectly horizontal isn't possible (till the speed is infinity), when we swing the bob, it does seem to be close to the eye. Thus, x is small (4-5 degrees at the most?). Thus, isn't x too small for sinx to...
  3. N

    Swinging bob

    Help? I am really feeling very anxious... Could it be air molecules?
  4. N

    Swinging bob

    Thanks for the reply! But then how does it keep moving in a "straight" circle? Why doesn't it become a cone shaping circle? Thanks!
  5. N

    Swinging bob

    Hi! I was just wondering regarding this. When we swing a bob tied to a thread, completely perpendicular to the vertical wall (that is, parallel to the floor), what force balances the weight of the bob? I don't think it can be mv^2/r because that centripetal force is perpendicular to the...
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