From the top of a cliff, at a height of 45 m above the
sea surface, a projectile is launched at an initial speed of 100 m
/ s, at an elevation angle of 60 degrees. After the projectile
touches the surface of the water, it enters the sea experiencing a
constant horizontal retardation of -25 m / s ^ 2 and a constant
vertical retardation of -3 m / s ^ 2, both for a time of 2 sec,...