If the valve can be opened with a couple moment of 25 N•m, determine the required magnitude of each couple force which must be applied to the wheel.

#### Solution:

As the required couple moment is 25 N•m, we can write an equation to figure out the force required to create such a moment.

25=F(0.15+0.15)

(note we converted mm to m)

F=83.3 N

We assumed clockwise moment to be positive, however, if the opposite was assumed, then force F would also be negative, leading to the same answer.