Finding velocity with magnetism?

Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
2 replies · 3K views
papi
Messages
31
Reaction score
0

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.
 
Physics news on Phys.org
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?