4. straight line. Describe how the position and acceleration of the object with appropriate units The given graph represents the velocity of an object in units per second moving along a is changing at the given time or time interval. (a) Between 0-2 sec (b) Between 2-4 sec (c) Between 4-5 sec (e) Between 5-6 sec (g) Between 7-10 sec (d) At 5 seconds (1) Between 6-7 sec sight.