Finding velocity with magnetism?

  • Thread starter papi
  • Start date
1. The problem statement, all variables and given/known data

An electron moves at right angles to a magnetic field of .14T What is its speed if the force exerted on it is 8.7 X 10^-15 N?

I am at a complete lossfor this question.


Homework Helper
Look up magnetic force (or Lorentz force law).
so if F=qvB
then V=Bq/F

but when i plus in the charge for the electron is it negative or postive 1.6 x 10^-19 bc can a velocity be a negative answer?

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