Question

for the center of mass. .8.39 A fire hose 4.00 cm in diameter is capable of spraying water at a velocity of 10.0 m/s. For a continuous horizontal flow of water, what horizontal force should a fireman exert on the hose to keep it stationa

Answer 1

force required = 0.5 pAv^2

where p = density of water

A = cross sectional area

v = velocity

F = 0.5*1000*pi*0.02^2*10^2

= 62.83 N

so the force required by fireman = 62.83 N