Constant+Velocity

=media type="youtube" key="51OB1Dk09gw&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999" height="344" width="425"= =Constant Velocity= Speed - Rate of Motion; Distance covered per unit time. Velocity - A vector quantity that includes both magnitude and direction; Displacement / D Time. Distance - The amount of space traveled; amount of space between two points. Displacement - Change in Position; D Position = Pf - Pi. Reference Point - Observation Point; Starting Point of Measurements. Reference Frame - The perspective of an Observer.

=Pos vs. Time Graph= - A graph that shows an objects position and when it is there. Þ The slope of a position versus time graph represents the objects velocity. When the slope is positive the object is traveling away from the origin or reference point. The object is traveling back towards the reference point when the slope is negative. However, this is only true in quadrant I (+,+) of a graph because in quadrant IV (+,-) this is reversed. It is impossible to include quadrants II (-,+) and III (-,-) because negative time cannot be acheived. Also, undefined slopes (vertical lines) are physically impossible because the object would need to be in multiple places at once. A horizontal slope, however, can exist. This only means the object is not moving.

Graph Description: Leg1; Slope = 5/2 = Velocity = 2.5(m/s) Leg2; Slope = 0 = Velocity = 0(m/s) Leg3; Slope = 7/5 = Velocity = .71(m/s)

=Examples of Constant Velocity:= A car driving at the speed limit. A train after accelerating and before decelerating. The Cruise velocity of a plane.