Resultant force on vane

[foo9008]

Homework Statement

in the calculation , the direction of resultant force that we got is the force of vane act on water , right ? to get the resultant force act on vane ? it should be opposite to the force of vane act on water , am i right ? IMO , the resultant force at stationary vane (which is caused by water) should be act to right and upwards , am i correct ?

Homework Equations

The Attempt at a Solution

 

[Chestermiller]

Yes.