In statics, a couple is defined as a. two forces in the same direction separated by a perpendicular distance. b. two forces of equal magnitude c. two forces of equal magnitude acting in the same direction d. two forces of equal magnitude acting in opposite directions

True or False 1. The moment of force is maximum when the moment arm is perpendicular to the applied force? 2. The weight of a body produces a tendency to rotate.  3. The weight is always acting at the geometric center. 4. For uniform body, the center of gravity and centroids acts on the same point. 5. In equilibrium, The net moment of force at the centroids is zero. 6. The center of gravity is always at the geometric center of the body. 7. The moment of inertia is directly proportional to the distance from the neutral axis.

The following statements are true, except. a. The resultant of two forces is the diagonal that can be formed within the parallelogram which can be drawn from the vectors of the sald forces. b. Parallelogram law cannot be applied to solve the resultants of a force system with just two forces. c. Two forces can only be in equilibrium when they have equal magnitudes, opposing directions, but lie on the same line of action. d. A force system in equilibri um may be combined to any other force system and the effect of the resultant of that latter system will not be altered. e. Action and reaction forces are same or equal in magnitude and direction.

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How to answer 1?

Which of the following is false about two-force members? a. The line of action of the internal force in the member is always known. b. The external forces act at only two points on the member. c. The magnitude of the internal force is constant along the length of the member. d. The direction of the internal force in the member is always know/   Which of the following internal forces (and moments) prevents relative rotation about the y-axis of a member? a. Fx b. Fy c. My d. Mz

It is the tendency of a force to rotate a body. Select one: a. Couple b. moment of a force about a point c. moment arm d. moment of a force about an axis

Question #4: Find-an-equipollent-force-passing-through-point-A-and-a-couple-to-replace the combination. of forces-and-moments-in-the-figure-below. A -6 m 20 N 141.4 N -6 m 500 N. m 6 m 50 N

The following forces act concurrently on a body: A = 50 lb, directed 30 degrees N of E; B = 80 lb, directed NW; and C = 100 lb, directed east. What is the magnitude and direction of the force vector A + B? What is the magnitude and direction of the force vector A + B – C?

A couple is a free vector. true false