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If the forces acting on the couple acting on the screw are in the same direction, that is they are not in the opposite direction as always they are, then?

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If the forces acting on the couple acting on the screw are in the same direction, that is they are not in the opposite direction as always they are, then?

(a) The direction of the forces doesn’t determine the moment

(b) The couple moment will be maximum

(c) The couple is not possible

(d) No change occurs

The question was asked in an internship interview.

This key question is from Frictional Forces on Screws topic in portion Friction of Engineering Mechanics

1 Answer

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Correct answer is (c) The couple is not possible

The best explanation: The forces are always in the opposite direction for the couple moment. But if they don’t act like the same that is they change their directions and align themselves in the same direction then the couple is not possible.

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