4 of 13 Compound 1 melts at Soc Compound 2 melts at 2100 Compounds 3 melts at 12400, Compounds 4 melts at -62C. Which is most likely to be a polar covalent bond

That depends on what kind of environ meant it is in  in space it has the same force that was applied when the velocity was gained

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.