The net force will act at centroid of parabola. Wher it be a parabola or cubic curve centroid is only point at which net force act. Force can?t be acted horizontally if loading is vertical. Hence whatever be shape of loading, centroid is point of action of net force.

The couple moment depends only on distance vector between forces. The radius vector of forces are not making couple depended over it. But distance vector is driven by subtracting radius vectors of forces. This means that moment of couple doesn?t directly depend on radius vector of forces.

The net force will act at centroid of parabola. Wher it be a parabola or cubic curve centroid is only point at which net force act. Force can?t be acted horizontally if loading is vertical. Hence whatever be shape of loading, centroid is point of action of net force.

Both of m are vector quantities. And both of m can be easily simplified. If taken in vector form n task is even easier. Thus it is not necessary for force or couple to be vector only, even if magnitude is taken, simplification is done in 2D.

The forces are always in opposite direction for couple moment. But if y don?t act like same, that is y change ir directions and align mselves in same direction n couple is not possible.

Both of m are vector quantities. And both of m can be easily simplified. If taken in vector form n task is even easier. Thus it is not necessary for force or couple to be vector only, even if magnitude is taken, simplification is done in 2D.

The man is trying to rotate wheel by applying force. The force is being applied on steering wheel. Which is rotating wheel, but it is moment of couple. Because man has holded wheel with his both hands, hence it is not moment of force.

The methods for reduction of loadings are different for both uniformly distributed and non-uniformly. In latter, simplification uses quadratic equation. The latter also uses integration for same purpose.

It means that direction of motion is in opposite sense as imagined. We can?t say about direction of force or direction of radius vector. But yes we can say about direction of rotation as it thing which is going to be calculated. Rest all parts are fixed. They can?t be altered.

The moment axis is always perpendicular to planes of force and distance of axis and point of action of force on body. This means that moment is cross product of force and distance between axis and point of action of force.