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Average velocity is a measure of an object's displacement over a given period of time. It is calculated by dividing the change in position by the change in time.
Average velocity is represented by the slope of a line on a position-time graph. The steeper the slope, the greater the average velocity.
To calculate average velocity from a position-time graph, you can choose two points on the line and use the formula (change in position)/(change in time). Alternatively, you can find the slope of the line using the rise over run method.
Yes, average velocity can be negative if the object is moving in the opposite direction of the positive direction on the position-time graph. This indicates that the object is moving backwards or in the negative direction.
The units for average velocity are typically distance divided by time, such as meters per second (m/s) or kilometers per hour (km/h). The specific units used will depend on the units of measurement for the position and time on the graph.