Pretty close to 10.91 miles per hour.
-- finish a marathon in 2hours 24minutes 12.2seconds (very impressive)
-- run a mile in 5minutes 30seconds (not too shabby)
-- 100 yard dash in 18.75 seconds (loafing)
-- cover a straight-line route to the moon in about 909 days (ridiculous)
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16 inches/2 sec = 8 inches per second thats is 8/12 = 2/3 feet per second and since 88 feet per sec = 60 mph that is 2/3/88 x 60 = less than 1/2 mile per hour
16 feet/second is the speed. To know the velocity, you would also need to specify the direction in which the object moves.
The penny drop a height after 1 second penny is on the ground
16 miles per hour is 25 km(kila miles)
I assume the object starts from rest. The speed will be 16*3 which is 48m/s