ch22_p45 - 45. We take the positive direction to be to the...

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45. We take the positive direction to be to the right in the figure. The acceleration of the proton is a p = eE / m p and the acceleration of the electron is a e = – eE / m e , where E is the magnitude of the electric field, m p is the mass of the proton, and m e is the mass of the electron. We take the origin to be at the initial position of the proton. Then, the coordinate of the proton at time t is
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