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Describe the moment of a force about a point as a vector quantity.

Answer» <html><body><p></p>Solution :In Fig. O is the <a href="https://interviewquestions.tuteehub.com/tag/point-1157106" style="font-weight:bold;" target="_blank" title="Click to know more about POINT">POINT</a> of rotation, P is the point of application of a force `vecF`, `vecr`=`vecOP`, <a href="https://interviewquestions.tuteehub.com/tag/position-1159826" style="font-weight:bold;" target="_blank" title="Click to know more about POSITION">POSITION</a> vector of the point `vecP`, with respect to the point O. Then the moment of the force `vecF` about the point O, is `vecF=vecrxxvecF` <br/> According to the <a href="https://interviewquestions.tuteehub.com/tag/properties-11511" style="font-weight:bold;" target="_blank" title="Click to know more about PROPERTIES">PROPERTIES</a> of cross <a href="https://interviewquestions.tuteehub.com/tag/product-25523" style="font-weight:bold;" target="_blank" title="Click to know more about PRODUCT">PRODUCT</a> the direction of the vector `vecG` is along the direction of advance of a righthanded screw, when it is rotated from `vecr` towards `vecF`. The direction of `vecG`, as shown in the figure, is perpendicular to the plane of rotation, i.e., <a href="https://interviewquestions.tuteehub.com/tag/always-373607" style="font-weight:bold;" target="_blank" title="Click to know more about ALWAYS">ALWAYS</a> along the axis of rotation.<br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/CHY_DMB_PHY_XI_P1_U05_C01_E02_001_S01.png" width="80%"/></body></html>


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