Distance, speed and accelaration

• The definition of speed is the distance moved per unit of time
• The definition of acceleration is the change in velocity per second
• Mass is how much ”matter” an object has, it is measured in kilograms (kg)
• Thinking distance is the distance travelled whilst reacting to a situation
• Braking distance is the distance travelled whilst the brakes are applied
• Velocity time graph: Constant deceleration

  
• Wet road conditions increase your average stopping distance
• Tyres with less tread decrease your average stopping distance
• Decreasing your speed decreases your average stopping distance
• Velocity time graph: constant accelaration

  
• Velocity time graph: Constant speed

  
• Distance time graph: constant speed (back to zero)

  
• Distance time graph: constant speed

  
• distance time graph: stationary

  
• what are the two rules for a velocity time graph

  • the slope is equal to the accelaration
  • the area under the graph is equal to the distance travelled
• What is the rule for distance time graphs

  The gradient of the graph indicates the speed of the object
• What is the change in velocity measured in


  Velocity - meters/second
• What is time measured in

  Seconds
• What is acceleration measured in

  Metres/ second (squared)
• What is distance measured in


  Metres
• What is speed measured in


  Metres/second