theoretically, calculate what should the magnitude of vl be at the cutoff frequency fc? mark this value on both plots using the "data cursor" and include the marked plots in your report.

Definitely the indoraptor

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. 

One answer could be erosion