1. Consider three point charges, 5;; : 4.5K) C, q? : 4.5[1 C, and 13 : 6.1%] (3, located at the corners of an isosceles triangle. The charges qi and q2 are 51H] In apart and form the base. The triangle is 3.50 In high, and 9.3 is located at the top. Calculate the magnitude and direction of the resultant force on qa. 2. Four charged parn'cles are placed so that each particle is at the comer of a square. The sides of the square are 15 cm. The charge at the upperleft corner is +31} pl], the charge at the upperright corner is . p.13, the charge at the lowerleft comer is 2.4 \"C, and the charge at the lowerright corner is 9.CI p.13. 3. What is the net electric force on the +3.0 MC charge? b. What is the net electric force on the E. p.13 charge? c. What is the net electric force on the 9.{] HC charge