This motion could best be described as C) constant acceleration and increasing velocity
Explanation:
Constant acceleration motion or uniformly accelerated rectilinear motion (u.a.r.m) is a movement in which mobiles move in a straight line at a speed that varies uniformly over time. In other words, the u.a.r.m occurs when its path is a straight line and its acceleration is constant and different from 0. This implies that the speed increases or decreases its modulus in a uniform way.
This type of movement occurs in this case, where the acceleration will then be constant and as the locomotive starts from rest and moves up to a speed of 2.4 meters per second. in 20 seconds, then the speed will increase evenly.
So, this motion could best be described as C) constant acceleration and increasing velocity.