Chapter 4, Problem 8P

The towline exerts a force of P = 4 kN at the end of the 2O-m-long crane boom. If x = 24 m , determine the position 0 (in °) of the boom so that this force creates a maximum moment about point O. B P = 4 kN 20 m 1.5 m

The pipe assembly is subjected to three forces of F1 = {3.00, 4.00, -2.00} kip, F2 = {0, 0,-4.00} kip, and F3 = {-3.00, 0, 0} kip. Determine the sum of the moment of the forces 1) about x-axis (the unit vector of x is i) and 2) about line AC. Express the result as a Cartesian vector.

Using the coordinate system shown for the system depicted. 1.6 m 2 m x- 1.5 m 0.8 m Determine the moment about point O of the force F acting on the assembly at point A, if the turnbuckle is tightened until the tension in cable AB is 2.4 kN. M = Mi + M,,j+ Mj (kNm), M2 -2.74 M.. A20 O Search for anything

Determine the magnitude of the moment of the force F={300i-200j+150k} N about the OA axis.

Determine the resultant moment produced by the forces FB and FC about point O. Express the result in vector notation and obtain its magnitude.

The roof is supported by the bracket at O and by two cables as shown in the Fig. below.  If the cables exert forces FAB = 100 N and FAC = 120 N on the wall hook at A as shown in Fig.;  Determine the moment about O  (the origin) of the forces exerted by the cables at B and C.

1) Determine the moment of the force about point 0. 100N 2m -5m-

Two forces can be replaced by an equivalent force R acting at point B on the beam. Determine thedistance b that locates B. (Hint: The combined moment of the two forces about any point is equal to themoment of R about the same point.)

If F = 120 N applies to the curved beam, determine the moment of this forceabout points O and B