A point-like negatively charged particle of mass m and charge -q is initially released from rest from the point P along the positive z-axis where the magnitude of the electric field is largest.
(a) What is the distance from the point P to the origin? Express your answers in terms of the following variables , if relevant, q ,m ,R ,Q , and epsilon_0 .
unanswered
(b) What is the speed of the particle when it reaches the origin? Express your answers in terms of the following variables , if relevant q ,m ,R ,Q , and epsilon_0 .
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Please some one answer.