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zaphod Group Title

A particle of mass 5kg is pulled along a smooth horizontal surfce by a horizontal string> if the acc of particle is 3ms-2find the tension

  • one year ago
  • one year ago

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  1. zaphod Group Title
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    @Callisto can i kw hw to apply the forces?

    • one year ago
  2. Callisto Group Title
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    |dw:1347114640040:dw| Consider the horizontal, Summation F = T = ma = 5(3), isn't it?

    • one year ago
  3. Callisto Group Title
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    |dw:1347114778579:dw| The vertical forces cancel out..

    • one year ago
  4. Callisto Group Title
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    Note that smooth = friction = 0N Note sure if I'm in the right direction :|

    • one year ago
  5. zaphod Group Title
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    yes |dw:1347114907153:dw|

    • one year ago
  6. Callisto Group Title
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    Why did you add that T?

    • one year ago
  7. zaphod Group Title
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    in a horizontal string tension acts oppostely

    • one year ago
  8. Callisto Group Title
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    Hmm.. I'm actually considering this part..|dw:1347115073162:dw|

    • one year ago
  9. zaphod Group Title
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    yes then continue?

    • one year ago
  10. Callisto Group Title
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    For that system, weight is balanced by the normal reaction. So, vertical forces cancel. Consider the horizontal force, since the surface is 'smooth', there is no friction acting on the particle. The only horizontal force acting on the system is tension. So, by Newton's 2nd law, T - f = ma , where f = 0, m=5 and a=3 So, you can find T.

    • one year ago
  11. Callisto Group Title
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    f= 0N, m=5kg and a=3ms^-2

    • one year ago
  12. zaphod Group Title
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    :) get it why is force = 0

    • one year ago
  13. keily Group Title
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    Tension=5kg times 3m/s=15N

    • one year ago
  14. Callisto Group Title
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    f is friction acting on the system by the surface. But the surface is smooth, so no friction acting on the system

    • one year ago
  15. Callisto Group Title
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    Any questions?

    • one year ago
  16. zaphod Group Title
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    nope clear :)

    • one year ago
  17. Callisto Group Title
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    Great!

    • one year ago
  18. zaphod Group Title
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    i thought there is an external force making the particle move, anyway nw i understnd

    • one year ago
  19. Callisto Group Title
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    That external force is the tension. If you don't pull the string, there is no tension, the block doesn't move. Perhaps you can consider that system only. I mean the force applied to that system.

    • one year ago
  20. zaphod Group Title
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    yes thanks u so much :)

    • one year ago
  21. Callisto Group Title
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    Welcome :)

    • one year ago
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