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The total of all the masses of small particles adds up to give the total body mass of the composite body. This mass lies along with gravity gives a force vector which is being passed by ________

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The total of all the masses of small particles adds up to give the total body mass of the composite body. This mass lies along with gravity gives a force vector which is being passed by ________

(a) Axis of rotation

(b) Axis of rolling

(c) Centre of Gravity

(d) Centre of mass

This question was posed to me in examination.

This question is from Composite Bodies topic in section Centre of Gravity and Centroid of Engineering Mechanics

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The correct answer is (c) Centre of Gravity

The best I can explain: The total body mass along with the product of gravity always passes through the centre of gravity. All the forces are parallel is the right answer. Thus the total sum of all these small weights adds up to the total weight of the body. Which passes through the centre of gravity.

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