1. (10 Points) A 300 g mass with a charge of +400 no moves upward between two uniform but oppositely charged plates as shown on the attached figure. The initial velocity of the charged mass is 250 After traveling 10 em its velocity is 50 a) What is the acceleration felt by the charge? b) What is the value of the electric field felt by the charge? ") What is the surface charge density on the plates and determine which plate is positive and which is negative?Final 10 cm Initial