A water hose has a flow rate of 3.0 kg/s of water. If the speed of the water as it leaves the hose is 5.0 m/s, then the magnitude of the additional force required to hold the hose as a result of the water being expelled is
A) 15 N.
B) 26 N.
C) 30 N.
D) 45 N.
E) 57 N.

Question

Quizplus · Accepted Answer

The force required to hold the hose is equal to the rate of change of momentum of the water. This is calculated as the product of the mass flow rate (3.0 kg/s) and the velocity of the water (5.0 m/s), which equals 15 N.

A Water Hose Has a Flow Rate of 3