Water from a reservoir is raised in a vertical tube of internal diameter D = 30 cm under the influence of the pulling force F of a piston. Determine the force (in N) needed to raise the water to a...

Water from a reservoir is raised in a vertical tube of internal diameter
D
= 30 cm under the influence of the pulling force
F
of a piston. Determine the force
(in N)
needed to raise the water to a height of
h
= 1.5 m above the free surface. Assume the piston to be weightless.