A Fire Hose Is Turned on the Door of a Burning

Multiple Choice

A fire hose is turned on the door of a burning building in order to knock the door down. This requires a force of 1000. N. If the hose delivers 40. liters per second, what is the maximum velocity of the stream needed, assuming the water doesn't bounce back?

A) 50. m/s
B) 25 m/s
C) 15. m/s
D) 40. m/s
E) 30. m/s