Wrench A B is used to twist a nut on a threaded shaft. Point A is located 120 mm from poin...

Wrench A B is used to twist a nut on a threaded shaft. Point A is located 120 mm from point O. and line a has x, y and z. direction angles of 36°,60°, and 72°. respectively. Point B is located at (0. 300.100) mm, and the force is

(a)  Determine the moment of about point A, , and then find the component of this moment about line a, Ma.

(b) Determine the moment of about point O, , and then find the component of this moment about line a, Ma.

Figure P4.36