(5) The turnbuckle is tightened to produce a 1.2 kN tension force in cable AB acting at point A of the arm. Use vector cross product to determine the moment vector of the tension about point O and then calculate its magnitude. Ans: Mo=-1.371 +2.19j+1.097 kN·m, Mo 2.81 kN·m 1.6 m 2 m 1.5 m 0.8 m B

#4

A wrench 1m long lies along the positive y-axis and grips a bolt at the origin (i.e. the wrench can be represented by vector <0,1,0>). A force is applied in the direction of the unit vector <0, 1/sqrt(2), 1/sqrt(2)> at the end of the wrench. Find the magnitude of the force in Newtons (N) needed to supply 5sqrt(2) N*m of torque to the bolt.  torque = | r x F |  if r = <0,1,0> and F = <0, 1/sqrt(2), 1/sqrt(2)> so the torque is equal to the magnitude of the cross product of these two vectors but I don't understand how to get incorporate the 5sqrt(2) N*m I know that the magnitude of the cross product must be equal to 5sqrt(2) but I am not sure how to work backwards to that answer, please help!.

For the stress tensor shown in question 3, find the traction vector, normal and shearing stress on a plane whos normal vector has 1 directional cosines / = 0, m = ½, n 9 FS