Q1. What is the electric potential energy of three equal positive charges of 1.33 µC while they are arranged to form a triangle 2.10 x 10-3 m on a side?
Q2. Two identical point charges of q = +2.00 x 10-8 C are separated by a distance of 0.50 m. How much work is completed by the electric field force to move them away from each other so that they are 1.04 m apart?
Q3. A ball on the porch rolls 20 cm to the porch's edge, drops 30 cm continues rolling on the grass, and eventually stops 50 cm from the porch's edge. What is the magnitude of the ball's total displacement, in centimeters?