Two identical particles of mass m carry a charge Q each. Initially one is at rest on a smooth horizontal plane and the other is projected along the plane directly towards the first particle from a large distance, with the speed v. Find the closest distance of approach.
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The masses are identical, each of mass m. Therefore we cannot treat any particle too heavier and hence at rest throughout. External force on the system is zero. Therefore according ...
Solution with equations and explanations. MS Word attachment.