Physics

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Three point charges are fixed on the x-axis: 8.7×10^−6 C at x = −0.68 m, −3.0×10^−6 C at the origin, and 2.6×10^−6 C at x = 0.65 m. Find the electrostatic force acting on the charge at the origin due to the other two charges. Let a positive value indicate a force in the positive x direction, and a negative value indicate a force in the negative x direction.

  • Physics -

    The + charge at -.68 pulls the charge at the origin left (-)

    The + charge at +.65 pulls the origin right (+)
    so
    F = k*10^-12 (2.6/.65^2 -8.7/.68^2)(3.0)

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