Question

A uniform sheet of charge lies on a horizontal surface. A point charge of -8 micro-coulombs is located 0.18 meters below the sheet. At a point 0.4 meters above the sheet, directly above the charge, the total electric field from the sheet and the point charge is zero. Then, the point charge below the sheet is removed and a point charge of -7 micro-coulombs with a mass of 0.5 kg is placed 0.4 meters above the sheet and launched vertically upwards at 13 m/s. What is the maximum height the charge reaches (maximum distance from the sheet) in meters when including the weight as well?

ANSWER: 7

$hw2_sheet.JPG$

Answer 1