Methods of determining g

• Use Light gate 1 to measure initial velocity

  Use light gate 2 to measure final velocity

  Use a ruler to measure the distance between the light gates

  
  

  V^2 = U^2 + 2 * a * s

  
  

  V^2-U^2/2*s = a
• drop a ball from different heights

  measure S using a ruler

  and measure the time taken for the ball to drop by using a stopclock

  
  

  plot graph H against t^2

  
  

  S = ut + 1/2 at^2

  As initial velocity = 0

  S = 1/2 at^2

  Therefore gradient = 2*a
• How can experiment be made more accurate

  Make sure height is as large as possible therefore reduces uncertainty