The velocity vectors of both objects point in the positive x direction. In one dimension the average velocity of an object in the time interval D t is given by , and the instantaneous velocity is given by . We can represent this motion in various ways. We may use a formula and write . We can construct the table below.
Diagrams can also represent the motion.
One type of motion diagram is a ticker-tape diagram . A moving object drags a tape past the ticker, and a trail of marks is left on the tape. For an object moving with uniform velocity the marks are spaced uniformly on the tape. A vector diagram can also describe the motion of our cart. At evenly-spaced time intervals we depict the relative magnitude and direction of a vector quantity, such as the velocity.