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In the air, it had an average speed of 16m/s. In the water, it had an average speed of 3m/s before hitting the seabed. The total distance from the top of the cliff to the seabed is 127 meters, and the stone's entire fall took 12 seconds

 Mar 4, 2022
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16 (x)  +   3 (12-x)   = 127        x = air time    12- x = sea time

x = 7 seconds       height = 16 m/s *  7 s = 112 meters

sea time = 5           depth =  3 m/s * 5 s =  15 meters

 Mar 4, 2022

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