Distancetime graphs Distancetime graphs Distancetime graph show the
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Distance-time graphs
Distance-time graphs • Distance-time graph show the time taken to travel a certain distance.
Distance-time graphs • Distance-time graph show the time taken to travel a certain distance. • The slope (gradient) of the graph gives information about speed.
Distance-time graphs • Distance-time graph show the time taken to travel a certain distance. • The slope (gradient) of the graph gives information about speed. • The slope of any graph is calculated using: Slope (gradient) = change in y-axis change in x-axis
Distance-time graphs • Distance-time graph show the time taken to travel a certain distance. • The slope (gradient) of the graph gives information about speed. • The slope of any graph is calculated using: Slope (gradient) = change in y-axis change in x-axis d Distance t Time
Distance-time graph • For a distance-time graph: Slope = d = Distance Travelled t Time taken
Distance-time graph • For a distance-time graph: Slope = d = Distance Travelled t Time taken • On a distance-time graph: - The slope of the graph represents speed
Distance-time graph • For a distance-time graph: Slope = d = Distance Travelled t Time taken • On a distance-time graph: - The slope of the graph represents speed - A straight line has a steady slope, and so represents constant speed
Distance-time graph • For a distance-time graph: Slope = d = Distance Travelled t Time taken • On a distance-time graph: - The slope of the graph represents speed - A straight line has a steady slope, and so represents constant speed - A horizontal line has zero slope and so shows zero speed (not moving)
Distance-time graph • For a distance-time graph: Slope = d = Distance Travelled t Time taken • On a distance-time graph: - The slope of the graph represents speed - A straight line has a steady slope, and so represents constant speed - A horizontal line has zero slope and so shows zero speed (not moving) - The steeper the slope, the greater the distance travelled in the time taken, so the greater the speed.
Glue in the examples
Distance-time graph • When a distance-time graph is not a straight line, the slope is changing, and so the speed is changing. distance distanc e time • Slope increasing – shows acceleration (speeding up) • Slope decreasing – shows deceleration (slowing down)
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