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Distance-time graphs

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.

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.

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.

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

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

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

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

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

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

Glue in the examples

Distance-time graph • When a distance-time graph is not a straight line, the slope

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)