A very small object with mass 8.20 10 -9 kg and positive charge 6.50 10 -9 C is
A very small object with mass 8.20 × 10-9 kg and positive charge 6.50 × 10-9 C is projected directly toward a very large insulating sheet of positive charge that has uniform surface charge density 5.90 × 10-8 C/m2. The object is initially 0.400 m from the sheet. What initial speed must the object have in order for its closest distance of approach to the sheet to be 0.100 m?
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