A common lecture demonstration is to drop a ball from height of 1m and measure the time of flight with an electric timer a typical result is .45 s. although the measurement is rarely repeated, values on other days in other lectures suggest uncertainty of +/- 0.05 sec.
a.) what is the value of g and its uncertainty inferred from this data. I got the value of g as 2.11 m/s but i am having trouble figuring out the uncertainty.