Acceleration: Forces: Physics: GCSE (9:1)

• Velocity

  The speed of an object in a particular direction

  
• Acceleration


  The rate of change of velocity or the amount that velocity changes per unit time

  
• Δv = v – u

  The equation linking change in velocity, final velocity and initial velocity

  
• Δv


  The symbol for change in velocity

  
• v

  The symbol for final velocity

  
• u


  The symbol for initial velocity

  
• a = Δv / t

  The equation linking (average) acceleration, change in velocity and time

  
• a


  The symbol for acceleration

  
• t


  The symbol for time

  
• Metres per second squared (m/s²)


  The SI unit for accelerarion
• Metres per second (m/s)


  The SI unit for speed and velocity
• Second (s)


  The SI unit for time
• Deceleration

  When an object is slowing down and its acceleration has a negative value