A collision between two identical pucks, one moving and the other stationary, takes place on ice. The puck with an initial momentum of 4.0 kg. m/s is deflected 60.0° eastward from its original path.

a. Using the law of conservation of momentum, what is the momentum of the puck that was originally stationary after the collision?

b. Calculate and compare the KE before and after the event. Use this comparison to determine the type of collision (elastic, inelastic, or explosion).

Ibelieve that the correct answer is: c. along plate boundaries

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.