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Homework Help: Calculating point charges and ratio of electrostatic force to weight

  1. Jan 28, 2009 #1
    1. The problem statement, all variables and given/known data
    Measurements show that a honeybee in active flight can acquire an electrostatic charge on the order of 93 pC.

    a)How many electrons much be transferred to produce this charge?
    Ne = *
    b) Supposing two bees, both with this charge, are separated by a distance of 12 cm. What is the magnitude of the electrostatic force between the these two bees? (You may treat the bees as point charges.)
    FE= N *
    5.399e-9 OKc) What is ratio of this electrostatic force to the weight of 0.14 gm bee?
    FE/Fweight =
    3.783e-7 NO

    2. Relevant equations

    3. The attempt at a solution

    I got through the first two parts, but in order to calculate the ratio of the electro static force to the weight I simply tried Fe/Fweight, 5.39e-9 / .00014 = 3.856e-13
    Is there a specific relationship between the forces that I should know before trying to proceed?
  2. jcsd
  3. Jan 28, 2009 #2


    User Avatar
    Homework Helper

    Nope. They are completely different kinds of force (except for the fact that, in freshman physics, they both obey the inverse square law).
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