- #1
David112234
- 105
- 3
Homework Statement
Homework Equations
F_f = Nu
F_B - IL x B
The Attempt at a Solution
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Using the hint
"The rod will begin to move when the force of friction is equal to the force due to the magnetic field."
I was able to get the answer
But I don't understand why it is that way. In order make the rod move, wouldn't the force from the magnetic field have to be greater than the friction force? if they are equal than the net force is zero and there can not be an acceleration since F(net) = ma