Finding velocity with magnetism?

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SUMMARY

The discussion centers on calculating the speed of an electron moving perpendicular to a magnetic field of 0.14T, given a force of 8.7 x 10^-15 N. The relevant formula is derived from the Lorentz force law, expressed as F = qvB, leading to the rearranged equation v = Bq/F. The charge of the electron, which is -1.6 x 10^-19 C, is crucial for the calculation, although the velocity itself is a scalar quantity and should be reported as a positive value.

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Homework Statement



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.
 
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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 positive 1.6 x 10^-19 bc can a velocity be a negative answer?
 

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