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## Homework Statement

At the height h, from the top of inclined plane forming an angle α with the horizontal, a disk slips down which has radius R, thickness d, mass m and resistivity ρ. On inclined plane, an area S is very small square that has a magnetic field B. The magnetic field B is directed horizontally, intensity is constant, at distance R from surface of inclined plane (figure)

Find the velocity of center of mass at time when the disk leaves the magnetic area. Suppose that the disk rolls without slide

## Homework Equations

Newton's law: F=ma $$\vec{E}=\vec{v}×\vec{B}$$

Current density $$\vec{j}=\frac{I(\vec{l}\vec{n})}{S}\vec{n}$$ with \vec{l} is vector unit alongs electric current

Differential form of Ohm's law: $$\vec{E}=ρ\vec{j}$$

## The Attempt at a Solution

Force is appeared by magnetic field, along x-axis and y-axis are relational. Althought I can write Newton's law but I cant find the velocity

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