Compute your average velocity in the following two cases: (a) you walk 85.2 mat a speed of 2.24 m/s and then run 85.2 m at a speed of 3.73 m/s alonga straight track. (b) you walk for 1.00 min at a speed of 2.24 m/s and then run for 1.30 min at 3.73 m/s along a straight track. the position of an object moving along an x axis is given by x 3.181-4041? + 1.05 where x is in meters and in seconds. find the position of the object at the following values of (a) 15.0 2 , and (d) 4 s. (e) what is the object's displacement between 0 andt - 457 what is its average velocity from t - 2 stot - 4s?