Lag1989 task 1.40

From the deck of the ship, going with the speed and released straight up shell with an initial velocity Vo with respect to the ship. Neglecting air resistance, find in the fixed system of water-related frame of reference: a) dependence on the time module v; b) the angle between the vector of the projectile velocity and the y-axis versus time; c) the equation of the trajectory of the projectile (x).