The solution of the problem 2.76 кр 2 from the problem

The solution of the problem 2.76 кр 2 from the problem

Task 2.76
Under the action of a homogeneous magnetic field perpendicular to the lines of induction,
Move a rectilinear conductor with a mass of 2 g, along which the current flows 10 A. Which magnetic flux
Will cross this conductor by the time when its speed becomes 31.6 m / s?