Consider the following in respect of moment of a force: 1. The moment of force about a point is independent of point of application of force. 2. The moment of a force about a line is a vector quantity. Which of the statements given above is/are correct?

  1. A. 1 only
  2. B. 2 only
  3. C. Both 1 and 2
  4. D. Neither 1 nor 2

Correct Answer: D. Neither 1 nor 2

Explanation

Statement 1 is false: The moment of a force about a point is given by \vec{M} = \vec{r} \times \vec{F}, which depends on the position vector \vec{r} of the point of application. Statement 2 is false: The moment of a force about a line is the scalar projection of the moment vector onto that line, making it a scalar quantity. Thus, neither statement is correct.

Related questions on Vector Algebra

Practice more NDA Mathematics questions