1. Displacement: a vector quantity that refers to how far an object is from its original position.
  2. Instantaneous speed: the speed of a car over a very short period of time, found by drawing the tangent to the distancetime graph and determining its gradient.
  3. Average speed: distance travelled divided by time taken.
  4. Velocity: change in displacement divided by time taken.
  5. Acceleration: the rate of change of velocity.

v = frac{Delta s}{t} and a= frac{Delta v}{Delta t} Delta

  Graphical representations of these quantities:

All these quantities can be represented on graphs (quantity against time).

  1. Displacement-time graphs: velocity is gradient.
  2. Velocity-time graphs: acceleration is gradient; displacement is area under graph.