Water leaves the fireman's hose at rate of 7.2 kg/s and with a velocity of 21 m/s. Calculate the force exerted by the water jet on the wall of a building.
physics - drwls, Wednesday, January 26, 2011 at 10:24am
Splashing agaist the wall will reduce the water's forward momentum to zero. Ignore any backward momentum.
The force will be
momentum flow rate
= (mass flow rate) * V
It will be in Newtons