A fountain projects water vertically to a height of 5 m. What is the velocity with which the water must be leaving the fountain nozzle? A stone is thrown vertically upwards with an initial velocity of...

A fountain projects water vertically to a height of 5 m. What is the velocity with which the water must be leaving the fountain nozzle?

A stone is thrown vertically upwards with an initial velocity of 9 m/s. What is the greatest height reached by the stone and the time taken?