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Posers and Puzzles

Posers and Puzzles

  1. Standard member smw6869online
    Granny
    10 Oct '07 02:50
    what is it?

    G.
  2. Standard member HandyAndy
    Non sum qualis eram
    10 Oct '07 13:25
    Originally posted by smw6869
    what is it?

    G.
    Misspelled
  3. 10 Oct '07 14:47
    Explain how G is a fictitious force?
  4. Standard member smw6869online
    Granny
    10 Oct '07 16:43
    Originally posted by doodinthemood
    Explain how G is a fictitious force?
    Can anyone explain what fictitious force is?


    Thank you
    My name is Granny( G.)
  5. 10 Oct '07 17:33 / 1 edit
    Originally posted by smw6869
    Can anyone explain what fictitious force is?


    Thank you
    My name is Granny( G.)
    First of all, it is friction force, not fictious force.

    Friction force is a force that sort of blocks objects from moving due to brushing to other objects, gases, liquids. However, it cannot actually move something, only restrict a movement, so it's work will aways be negative or zero.

    Some materials have interesting properties. For example Helium (the isotope with 4 protons) when cooled to ultra-low temperatures (4 kelvins) becomes 'supraviscose'. It can flow frictionlessly.
  6. 10 Oct '07 17:36
    A fictitious force is a force that is experienced within an accelerating reference frame. This "reference frame" could be a moving car for instance. If you suddenly apply the brakes, you will feel as though you're being pushed forward. In reality you're not being pushed: the car is being pushed backwards by the force applied by the breaks and your body just moves forward the way it did before you used the breaks. This is why you should wear seatbelts

    See also wikipedia, I think the examples illustrate the concept best.

    http://en.wikipedia.org/wiki/Fictitious_force#Examples_of_fictitious_forces
  7. Subscriber sonhouse
    Fast and Curious
    12 Oct '07 14:52
    Originally posted by zzyw
    A fictitious force is a force that is experienced within an accelerating reference frame. This "reference frame" could be a moving car for instance. If you suddenly apply the brakes, you will feel as though you're being pushed forward. In reality you're not being pushed: the car is being pushed backwards by the force applied by the breaks and your body just mov ...[text shortened]... concept best.

    http://en.wikipedia.org/wiki/Fictitious_force#Examples_of_fictitious_forces
    Good old Wiki.
  8. 13 Oct '07 04:28
    Originally posted by sonhouse
    Good old Wiki.
    Who is she, our lovely Wiki, anyway?