Distance - time graphs
Speed is just how fast you're going with no regard to the direction. Velocity however must also have the direction specified.
The gradient of the line tells you how fast your object is travelling. This is because the gradient is the change in the distance divided by the change in time.
1)Gradient = speed
2) Flat sections are where it's stationary
3) Straight uphill or downhill sections means it's travelling at a steady speed
4) The steeper the gaph, the faster it's going
5) Downhill sections mean it's going back towards its starting point
6) Curves represent acceleration or deceleation
7) A steepening cuve means it's speeding up (increasing gradient)
8) A levelling off curve means it's slowing down (decreasing gradient)
Velocity - time graph
1) Gradient = acceeleration
2) Flat sections represents steady speed
3) The steeper the graph, the greater the acceleration or deceleration
4) Uphill sections are acceleration
5) Downhill sections are deceleration
6) The area under any section of the graph is equal to the distance travelled in that time interval.
7) A curve means changing acceleration
Speed is just how fast you're going (e.g 30mph or 20m/s) with no regard to the direction. Velocity however must also have the direction specified e.g 30mph north or 20m/s south.