2.  Used to describe the velocity of a moving object during its motion.  depict the direction and relative speed by a vector arrow.

3.  The distance between dots on a ticker tape represents the object's position change during that time interval.  A large distance between dots indicates that the object was moving fast.  A small distance between dots means the object was moving slow.

4.  Car is traveling at a constant speed  Traveling at 10 m/s

5.  If the position-time data for such a car were graphed, then the resulting graph would look like the graph at the right.  Note that a motion described as a constant, positive velocity results in a line of constant and positive slope when plotted as a position-time graph.

6.  A car moving with a constant velocity of +10 m/s for 5 seconds.  That is, the slope of the line is +10 meter/1 second.  In this case, the slope of the line (10 m/s) is obviously equal to the velocity of the car.

7.  The slope of the graph on the right is larger than that on the left. This larger slope is indicative of a larger velocity.  The object represented by the graph on the right is traveling faster than the object represented by the graph on the left.

8.  The graph on the left is representative of an object that is moving with a negative velocity and is returning back to the reference point.  The graphs have similar features – they are both constant, negative velocity However, the slope of the graph on the right is larger than that on the left.  Once more, this larger slope is indicative of a larger velocity.  The object represented by the graph on the right is traveling faster than the object the left.

9.  The motion described as a constant, positive velocity results in a line of zero slope  A horizontal line has zero slope when plotted as a velocity-time graph.