HW help: Potential difference between axles?

[nightwing237]

Homework Statement

An automobile has a speed of 30m/s on a road where the vertical component of the Earth's magnetic field is .00008 webers/square meter. What is the potential difference between the ends of its axles, which are 2 meters long?

Homework Equations

The Attempt at a Solution

 

[Redbelly98]

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Homework Equations

The Attempt at a Solution