acceleration

• Aceleration describes the rate of change of velocity. It is measured in SI units of m/s/s. It is a vector quantity , and therefore needs direction.

  
  

  The direction of acceleration is shown by stating whether it is positive or negative. Positive acceleration is generally a slope or line going left to right upwards. Negative acceleration is usually going left to right downwards.
• key to formulas:

  a = acceleration (m/s/s)

  u = initial velocity (m/s)

  v = final velocity (m/s)

  s = displacement (m)

  t = time (s)

  
  

  additional:

  m = mass (g)
• acceleration due to gravity is constant (9.8m/s/s)
• when working out time what do you have to convert the units too?

  hr -> seconds

  km/h -> m/s