The crate of mass m = 41 kg is attached to the springs with constants k1 = 1 kN/m and k2 = 2 kN/m. Both springs are unstretched when δ = 0 and the box is centered between the two vertical walls. The crate is released from rest after being displaced a distance δ = 2 m and the coefficient of kinetic friction between the crate and the surface on which it slides is μk = 0.2.

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.