Question

The force exerted on a vane due to a jet of water is only a function of the mass flowrate and independent of the jet velocity. a)- True b)-False

Answer 1

Answer:

b) false

Explanation:

We know that rate of change of  momentum is called force.

So

Force = rate of change of momentum

$F=\dfrac{dP}{dt}$

We know that

P = m v

So

$\dfrac{dP}{dt}=\dfrac{dm}{dt}V$  (take velocity in constant and not changing with time)

$F=\dfrac{dm}{dt}V$

So $F=\dot{m}V$

So force exerted by jet depends on mass flow rate and velocity also.So our option b is right.