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Homework Help: What is the magnitude of the charge on each particles

  1. Jan 21, 2010 #1
    In the previous problem, what is the magnitude of the charge on each particle?

    the previous problem was
    Two point-like particles are placed 14.8 cm apart and are given equal and opposite charge. The first particle, of mass 41.0 g, has an initial acceleration of 1.40 m/s2 towards the second particle. What is the mass of the second particle if its initial acceleration towards the first is 1.05 m/s2?
    and the answer to that was 54.7g

    so i just dont know what I am doing wrong.

    so i did this
    q= sqrt(1/k d^2m1a1
    my answer came to 1.2E-5C but it isnt right. I dont see where I went wrong
  2. jcsd
  3. Jan 22, 2010 #2


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    Homework Helper

    You can just right
    m1*a1 = m2*a2 because both the charge experiance equal and opposite force of attraction.
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