: Ensure the glider remains motionless when no [[weight]] is attached. If the glider moves then adjust the feet on the [[Air Track|air track]] until the glider remains stationary.
: [[Lubricate]] the [[pulley]] to reduce the [[force]] of [[friction]] which acts against the [[weight]] added.
====Improving [[Precision]]====
: Calculate the [[weight]] added correct to two [[Significant Figure|significant figures]] by [[measure|measuring]] its [[mass]] to two [[Significant Figures|significant figures]] each time and using the equation <math>W=mg</math> with <math>g=9.8</math>. This will give a more [[precise]] knowledge of the [[weight]] rather than relying on the number printed on the [[weight]]s which may be [[precise]] to only one [[Significant Figure|significant figure]].
===Experiment 1b: Light Gates Measuring Displacement and Velocity===
====Improving [[Precision]]====
: Calculate the [[weight]] added correct to two [[Significant Figure|significant figures]] by [[measure|measuring]] its [[mass]] to two [[Significant Figures|significant figures]] each time and using the equation <math>W=mg</math> with <math>g=9.8</math>. This will give a more [[precise]] knowledge of the [[weight]] rather than relying on the number printed on the [[weight]]s which may be [[precise]] to only one [[Significant Figure|significant figure]].
: Use a ruler with a higher [[resolution]] to give a more [[precise]] [[displacement]] for the glider.
====Improving [[Precision]]====
: Calculate the [[weight]] added correct to two [[Significant Figure|significant figures]] by [[measure|measuring]] its [[mass]] to two [[Significant Figures|significant figures]] each time and using the equation <math>W=mg</math> with <math>g=9.8</math>. This will give a more [[precise]] knowledge of the [[weight]] rather than relying on the number printed on the [[weight]]s which may be [[precise]] to only one [[Significant Figure|significant figure]].: Use [[Light Gate|light gates]] and a [[Data Logger|data logger]] to record the [[time]] taken between each markerto reduce the [[Random Error|random error]] caused by the [[human]] use of a [[stopwatch]].