Question

A body is in equilibrium (translator + rotator) under the influence of a number of
forces. Each force has a different line of action. The minimum number of forces
required is​

Answer 1

Answer:

If 2 lines of action pass through the centre of mass of the body and the forces have different magnitude so the resultant not zero.

If 3 lines of action are not parallel, the body is in equilibrium. One line of action must be the result of other two lines of action. similarly if 3 lines of action are parallel.

 If 4 lines of action are parallel and all the forces have the same magnitude, the body is in equilibrium. The resultant must be zero.

Answer 2

Answer:

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