2 What is motion? A change in position Motion occurs when something changes position relative to a point of reference.
3 Point of ReferenceThe point that is used to determine if an object changes positionExample-If the starting line is your point of reference in a 100m race, then your position has changed by 100m relative the starting line and motion has occurred
4 DistanceDistance is the length of the route you travel.
5 DisplacementThe distance between the starting point and the ending point and the direction you travel.
6 Speed Speed is the distance an object traveled in a unit of time. Speed (meters /second)= distance (in meters)time (in seconds)
7 Average SpeedDivide the total distance traveled by the total time.
8 Instantaneous SpeedThe speed of an object at one instant in time.
9 Constant SpeedA speed that stays the same the entire distanced traveled.
10 Graphing Motion Use a distance-time graph Time is always plotted on the x-axisDistance is always plotted on the y-axisThe steeper the line the greater the speedA horizontal line means there is not change in position, which means the speed is zero.
11 VelocityThe velocity of an object is the speed of the object and the direction of its motion.Velocity can changeif the object’s speed increases or decreasesDirection of motion changesOr they both change