+ Motion and Speed Graphs Mrs. Gergel and Ms. Khericha

+ Motion Graphs Describing motion of an object is occasionally hard to to do with words Sometimes graphs help make motion easier to picture, and therefore understand. Here are some words we need to remember Motion is a change in position measured by distance and time Speed tells us the rate at which an object moves Velocity tells the speed and the direction of a moving object Acceleration tells us the rate speed or direction changes

+ Distance-Time Graphs Time is always plotted on the x-axis The further to the right on the axis the longer time from the start Distance is plotted on the y- axis The higher up the graph the further from the start time Distance

+ Distance-Time Graph If an object is not moving, a horizontal line is shown on a distance-time graph Time is increasing but the distance does not change It is not moving, so we say an object is at rest. time distance

+ Distance Time Graph If an object is moving at a constant speed, it means it has the same increase in distance in a given time Time is increasing to the right and distance is increasing constantly with time. The object moves at a constant speed time distance

+ Distance-Time Graph This graph shows an increase in speed since the line is going up and getting steeper Basically, this graph shows an object accelerating time distance

+ Speed-Time Graphs Speed time graphs look a like distance- time graphs Make sure you read the labels to read the graph correctly Time is on the x-axis Where speed (or velocity) are on the y- axis time Speed/Velocity

+ Speed-Time Graphs A straight horizontal line on a speed time graph means that speed is constant It has not decreased or increased as time has progressed time Speed

+ Speed Time Graphs This graph shows increasing speed or acceleration time Speed

+ Speed- Time Graphs This graph shows decreasing speed or deceleration time Speed