Physics URGENT!!!

At a certain location, the horizontal component of the earth's magnetic field is 2.5 x 10^-5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight. Find the speed of the proton.

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  1. QvB=mg Right?

    solve for B

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  2. can you please show me what you are doing to solve for v (not B)

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  3. v = QB/mg

    For Q, use the charge of a proton, in Coulombs. For m, use its mass. The values for proton mass ansd charge are readily available in your textbook or online.

    g= 9.8 m/s^2

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  4. its V=MG/QB MATE

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