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Water is falling from the H=1 m into the cylinder.

Diametr of the culinder d=20 cm

Q=dV/dt=100 (cm^3)/s (consumption of the water).

I have to calculate force, which acts on the bottom of culinder in the end of 30nd second.

I can't believe, that it is simply F=m*g (m=density*V; V=Q*t)! (here V- volume)

Should I also take into acount dinamic pressure? Pdin=density*(v^2)/2; (here v-velocity) v=sqrt(2*g*H)

F=m*g+pdin*S (S=pi*d^2/4 - area)

Help me please!