If tennis ball is thrown vertically with my hand to highest point with initial velocity 30m/s in a time of 3s. The ball takes 3s to move downwards. The question arises in my mind is that, Is tennis ball follow Newton's third law of motion?

Water flows through a garden hose which is attached to a nozzle. the water flows through hose with a speed of 2.19 m/s and through the nozzle with a speed of 19.8 m/s. calculate the maximum height (in m) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed.