Auniform electric field exists in a region between two oppositely charged plates. an electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate. 2.6 ã away, in a time 1.5 x 10 a s (a) what is the speed of the electron as it strikes the second plate? (b) what is the magnitude of the electric neo

Ibelieve the answer is b

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. 

Need more information like a picture

Inelastic is the answer your looking for.