Chapter 4, Problem 67P

The wrench is used to tighten a nut on the wheel. Determine the moment of the 120-lb force about the origin O. Express your answer in vector form.

Determine the moment of the force F=9i+18jlb about point O by the following methods: (a) vector method using rF; (b) scalar method using rectangular components of F; and (c) scalar method using components of F that are parallel and perpendicular to the line OA.

The force F of magnitude 200 N is perpendicular to the plane ABC. Determine the magnitude of its moment about the x-axis.

The trap door is held open by the rope AB. If the tension in the rope is T = 60 lb, determine its moment about the y-axis.

When the three forces are replaced by an equivalent force-couple system with the force at point O, the couple vector CR is directed parallel to the x-axis. Determine F and the resultant force-couple system.

Solve it correctly please.

Determine the moment of force F about the door hinge at B. Express the result as a Cartesian vector.

Determine the resultant moment of the two forces about the Oa axis. Express the result as a Cartesian Vector.

Determine the moment of the 80-lb force about the Oa axis. Express the result as a Cartesian vector. C 5 ft 30° 4 ft B 30° 45° 80 lb 6 ft 60° 120°