Question

Which of the following is correct?

(a) We cannot represent the moment caused by the force along any axis in vector form

(b) We can represent the moment caused by the force along any axis in the scalar form

(c) We cannot represent the moment caused by the force along any point in vector form

(d) We can represent the moment caused by the force along any axis in vector form

I have been asked this question in an interview for job.

Origin of the question is Moment of a Force on a Specified Axis in portion Force System Resultants of Engineering Mechanics

Answer 1

Right choice is (d) We can represent the moment caused by the force along any axis in vector form

Explanation: As moment is a vector, we can represent it in the vector form easily. Whether it may be the moment of the force acting on the body about the axis, or about the point. We can also convert the same in the Cartesian form too. The only thing we need to do is the cross product of the radius vector and the force vector.