Step $4$

Calculate he change $h,$ which is $H_2$ minus $)=(H_2-H_1$ for each trial and record them in Table $1$ below.

Step $5$

Find the reaction time using the formula:

$t=\sqrt[\phantom{2}]{\frac{2h}{g}}$

Data and Calculations

Table $1.$ Measurement results and reaction time

$\backslash$table$[[$Trial$,H_1,H_2,\backslash$table$[[h=H_2-H_1$