A Fire Fighter Sprays Water Horizontally at 10

Multiple Choice

A fire fighter sprays water horizontally at 10.0 m/s directly at the wall of a house on fire. If 25 kg of water are delivered in 2.5 seconds, the magnitude of the average force on the wall due to water, assuming that after the impact the water falls straight down the wall, is

A) 6.25 N.
B) 62.5 N.
C) 100 N.
D) 625 N.
E) 15.6 kN.