Will mark in a heat engine, if 700 j of heat enters the system, and the piston does 400 j of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 j? 1,500 j 900 j 1,100 j 300 j explain your answer.

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.