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Homework Help: Electricity with conservation of energy involved.

  1. Feb 6, 2013 #1
    A tiny sphere of mass 7.70 µg and charge −2.80 nC is initially at a distance of 1.74 µm from a fixed charge of +9.25 nC.
    (a) If the 7.70-µg sphere is released from rest, find its kinetic energy when it is 0.500 µm from the fixed charge.

    (b) If the 7.70-µg sphere is released from rest, find its speed when it is 0.500 µm from the fixed charge.
    m/s
     
  2. jcsd
  3. Feb 6, 2013 #2

    haruspex

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    As per the rules, please post any equations you deem relevant and your attempt at solution (or a clear statement of what hinders you from getting started).
     
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