# Speed, Distance & Acceleration

- Created by: Thea Strickland
- Created on: 04-01-21 09:45

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- speed, distance & acceleration
- Acceleration
- Acceleration is the change in velocity per second.
- Acceleration is measured in m/s2.
- a=v /t
- The triangle stands for “change in”.

- Speed
- Speed is measured in m/s.
- speed= distance/time

- Velocity
- Velocity is speed in a particular direction.
- Velocity is also measured in m/s.

- Distance-time graphs
- The ‘steepness’/gradient of the graph tells you the speed of the object.
- Steep line = high speed
- Less steep line = lower speed
- Flat/horizontal line = stationary

- Velocity-time graph
- The ‘steepness’/gradient of the graph tells you the acceleration.
- Steep line = high constant acceleration
- Less steep line = lower constant acceleration
- Flat/horizontal line = constant speed

- The area under the graph is the distance travelled.

- The ‘steepness’/gradient of the graph tells you the acceleration.
- Stopping distance
- Stopping distance = Thinking distance + Braking distance
- Thinking distance: distance travelled between seeing the object and applying the brakes.
- Braking distance: distance travelled between applying the brakes and coming to a stop.
- Stopping distance: total distance travelled between seeing the object and stopping.

- thinking distance / speed

- Stopping distance = Thinking distance + Braking distance

- Acceleration

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