The body falls from a height of 100m without an initial speed for how long the body passes the first and last meter of its path.

Decision:
It is known that the free fall time is calculated by the formula:
t = √ (2 * h / g)
ttotal = √ (2 * 100 / 9.8) = √ (200 / 9.8) = 4.517 sec – the total time of the body falling from a height of 100 meters
g = 9.8 m / s2 – acceleration of gravity
t1 = √ (2 * 1 / 9.8) = √ (2 / 9.8) = 0.451 sec – the time the body passes the first meter
t99 = √ (2 * 99 / 9.8) = √ (198 / 9.8) = 4.495 seconds – the time the body passes 99 meters
ttot – t99 = 4.517-4.495 = 0.022 sec – the time the body passes the last meter