A 15 kg block is released from the point A with an initial speed of 10 m/s as shown in figure. The track is frictionless except for the portion between points B and spring, which has a length of 100 m. The block travels down the track, hits a spring with spring constant of 2 N/m. The coefficient of static friction and kinetic friction between the block and the surface is 0.8 and 0.2, respectively. a) Find the speed of the block when it reaches the point B? b) Determine the compression of the spring due to the block. c) After stopped by spring, will the block moves again or not?

As newton's first law states a object in motion stays in motion

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. 

The geological theory that states that pieces of earth's lithosphere are in constant slow motion is the theory of plate tectonics.