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One of the use of the centre of mass or centroid is as in the radius of gyration is that the net force acts at the ___________ of the loading body.

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One of the use of the centre of mass or centroid is as in the radius of gyration is that the net force acts at the ___________ of the loading body.

(a) Centroid

(b) The centre axis

(c) The corner

(d) The base

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This is a very interesting question from Radius of Gyration of an Area in portion Moments of Inertia of Engineering Mechanics

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Right option is (a) Centroid

Explanation: In the moment of inertia calculations we see that the net force acts at the centroid of the loading body. That is if the loading system is in the form of the triangle then the at the distance 2 by 3 of the base the net force of the loading will act. And the load will be half the area of the loading.

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