Question
Physics Question on Fluid Mechanics
A wide hose pipe is held horizontally by a fireman. It delivers water through a nozzle at one litre per second. On increasing the pressure, this increases to two litres per second. The fireman has now to
A
push forward twice as hard
B
push forward four times as hard
C
push backward four times as hard
D
push backward twice as hard
Answer
push forward four times as hard
Explanation
Solution
The correct option is (B): push forward four times as hard.