Key Words (Distance, Speed and Acceleration)

• What is acceleration?

  Change in speed/time.
• What is the area under a velocity-time graph?

  The distance an object has travelled.
• What is breaking distance?

  The distance a car travels from when the brakes are applied until it stops.
• What are the breaking distance factors?

  Tyre condition, weather, road surface, condition of brakes and driver reaction time.
• What is the gradient of the velocity-time graph?

  Used to find the acceleration of an object.
• What is kinetic energy?

  ½ × mass × velocity²
• What is scalar?

  A quantity that has only magnitude.
• What is the formula for speed?

  Distance/time
• What is stopping distance?

  Thinking distance + breaking distance.
• What is thinking distance?

  The distance a car travels before the driver sees a hazard and reacts.
• What are traffic controls?

  Things used to control traffic speeds such as speed bumps and limits.
• What is a vector?

  A quantity that has a magnitude and direction.
• What is velocity?

  Speed in a given direction.
• What is the 'work done' formula?

  Force × distance.