At the instant you dropped it from your hand, its speed was zero.
The coin gained 9.8 m/s every second it fell. At the end of 1.85 sec,
just before it went 'tink' onto the ground, its speed was
(9.8 m/s) x (1.85 sec) = 18.13 m/s .
Its velocity at that final instant was 18.13 m/s downward.
