Question

a force acting at the centre of gravity is called as couple.​

Answer 1

Answer:

In mechanics, a couple refers to two parallel forces that are equal in magnitude, opposite in direction and do not share a line of action. A better term is force couple or pure moment. Its effect is to create rotation without translation or, more generally, without any acceleration of the centre of mass

Answer 2

Here we go ⬇️

• The center of gravity is the average location of the weight of an object. We can completely describe the motion of any object through space in terms of the translation of the center of gravity of the object from one place to another, and the rotation of the object about its center of gravity if it is free to rotate.

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