Recent content by Jenny0000

  1. J

    Stable equilibrium and non stable equilibrium question in electrostatics

    Just derive the U (potential energy) to dU/dx and d2U/dx2 .But I am not sure my sign is correct not ,my equation is correct not
  2. J

    Stable equilibrium and non stable equilibrium question in electrostatics

    can show the step？
  3. J

    Stable equilibrium and non stable equilibrium question in electrostatics

    Can anyone shows me what is wrong is my working,feel something wrong
  4. J

    Stable equilibrium and non stable equilibrium question in electrostatics

    It is a charge which repulsion refer to positive charge at the middle while attraction refer to negative charge at the middle.
  5. J

    Stable equilibrium and non stable equilibrium question in electrostatics

    Hi all , please refer to the picture regarding my working. please correct me if My working is wrong. I am quite confused about the positive and negative sign in equation
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    Finding the maximum velocity and PE of the block between 2 springs

    b)0.05-0.04=0.01 c)move at 0.02 right?
  7. J

    Finding the maximum velocity and PE of the block between 2 springs

    C) P.E=1/2 (12.5)(0.02)^2+1/2 (12.5)(0.02)^2 =0.005 J B)P.E=1/2 (0.01)^2+1/2(12.5)*(0.01)^2 =0.00125 J what is the next step? both answer is 0.16(b) and 0.0363 (c)
  8. J

    Finding the maximum velocity and PE of the block between 2 springs