Which of the following is certain to change as a ball accelerates?
A mass of the ball
B inertia of the ball
C velocity of the ball
Dforce acting on the ball occasionally

Pe = 1/2k(x)^2  and .05n/m = .05x10^-9m = x 

Good moring let me you on this question the answer the electric force  have a good day ; )

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

Ithink it’s: light bounce if off a mirror