A projectile is fired from a submarine traveling horizontally at 20 m/s with respect to the water as shown in the figure below. According to an observer on the submarine, the projectile is fired at 45° with an initial velocity of 60 m/s.After firing the projectile, the submarine continues to travel at 20 m/s.
According to an observer watching from a boat that is stationary with respect to the water, what will be the angle ? that the projectile makes with respect to the horizontal when it is launched?
A tugboat captain also sees the submarine fire the projectile, but to him is looks like the projectile is moving straight up (i.e. 90° above the horizontal). What is the velocity of the tugboat relative to the water?