true and false questions a. Any force F acting on a rigid body can be moved...

true and false questions

a. Any force F acting on a rigid body can be moved to an arbitrary point O provided that a couple is added whose moment is equal to the moment of F about point O.

b. The cross product obeys the commutative law, i.e. A x B = B x A

c. The centroid and center of mass of an object will coincide if we assume that the object is of non-uniform density.

d. In a truss problem that involves a large number of joints, if one is interested to nd the force in only a few members, then the method of joints is a faster approach than the method of sections.

e. In problems that involve shear and bending moment diagrams, if there are no couples applied at the ends of the beam, and if there are no supports imposing moment reactions at the ends, then the bending moment diagram always starts and ends at zero value for the beam's ends.

Expert Solution

samet mamat answered 2 years ago

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