What statement best describes his motion as he jogs around the curved part of the track? a. his speed stays the same, but his velocity changes. b. his speed changes, but his velocity stays the same. c. his speed and velocity both stay the same. d. his speed and velocity both change.

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.