2. A bullet enters a resistive medium at x = 0 with an initial velocity vo = 900 ft/s and travels 4 inches before coming to velocity 0. Assuming that the velocity of the bullet is defined by the relation v = vo - kx, where v is expressed in ft/sec andx in ft determine a) the initial acceleration of the bullet, b) the time required for the bullet to penetrate a distance of 2 inches into the resistive medium.
c) The graph of velocity vs. position (v-x) and position vs. time (x-t).
This exercise is about statics

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.

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. 

Ithink the answer is fusion 

The object's initial distance above the groundthe object's initial velocity