# Rate of flow and velocity

Hi

I hope some one will be able to help me.

I have a problem which requires me to find the force exerted on a truck which pumps water from its tank and through a hose at a rate of 10kg/s. The speed that the water exits the hose is 20m/s.

This is all the info i am given,

Regards

hhh79bigo

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FredGarvin
Based on the little bit you are given, I guess you'll have to use Newton's second law and momentum and use:

$$F = \dot{m} V$$ where

$$\dot{m}$$ = mass flow rate in kg/sec

$$V$$ = velocity normal to cross sectional area at exit in m/s

There are a lot of assumptions going on here.

Thanks alot

What are these assumptions,

HallsofIvy