Question 877894
In this case, L = 50 and g = 980. Plug them into the equation and evaluate with a calculator



{{{ T= 2(3.142) sqrt (L/g) }}}
{{{ T= 2(3.142) sqrt (50/980) }}}
{{{ T= 1.4194109 }}}



So it takes approximately 1.4194109 seconds.