Moment About an Axis
How would you find the moment acting to
twist the lower section of the bent pole in
the diagram?
Moment About an Axis
Projecting a vector
Projecting a moment vector on an axis
about that axis.
gives the effect of that moment acting
Given by the triple scalar product (TSP).
Does it matter which vector operation is done first, the cross product, or the dot
product?
See how the TSP reduces to a simple determinant.
What if we want the vector?
Moment About an Axis
If we want the vector,
we simple take the scalar product times the unit vector along the axis.
Simple example.
Moment About an Axis
What would be our algorithm for finding
the moment about OA? About AB?