Two different forces of magnitude 40 N and 30 N but unspecified direction act on the same object. Which of the following could not be a final magnitude of their net force? A) 10 N
B) 40 N
C) 50 N
D) 70 N
E) All of the magnitudes above are possible net forces.

A.adasnsnsnnskakakakwks

Not what goes around on earth but the universe too.

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.