Question

A fire hose can project water at a rate of 6.00x10^2 litres per minute to a height of 40.0m. Find:
a) the velocity with which the water leaves the tube
b) the kinetic energy of the water as it leaves the hose
c) the kinetic energy of the water at 40.0m.

Answer 1

a) sqrt(2 g H),
where H = 40 m.

b) g*H per unit mass

c) zero. It temporarily stops moving at maximum height (if aimed straight up)

You don't need the liter/minute rate