11th grade honors physics, i just need an educated guess, preferably right though, please <3 A man is pulling a small 30 kg child in a wagon. He applies a 20N force at an angle of 25 degrees to the horizontal. The child's dog starts tugging on the child's coat in the opposite direction, such that the child does not accelerate. What is the magnitude of force the dog is exerting? *

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.