- #1
Priyadarshini
- 191
- 4
Homework Statement
Water is pumped through a hose-pipe at a rate of 90 kg per minute. It emerges from the hose-pipe horizontally with a speed of 20 m/s.What is the force is required from a person holding the hose-pipe to prevent it moving backwards?
Homework Equations
F=ma--?
Ft=mv-mu
The Attempt at a Solution
90kg/min=0.025kg/s
This is m/t
So if we assume u=0m/s
Then, F= 0.025 x 20 (using Ft=mv-mu)
F= 0.5N
The answer is 30N
Can we assume that u is 0m/s?