If i wrote Moment is the force * the perpendicular distance , would i get 2 marks?
I'm no examiner but I think that what you just typed would earn one mark. The question asks specifically for the moment of a couple, so you should specify which force and which distance should be used in the calculation. Of course for two marks, do not include the diagram and example. I would probably write the following:
'(The moment of a couple is) the product of the magnitude of one the forces in a couple and the perpendicular distance between those two forces.'
I'm no examiner but I think that what you just typed would earn one mark. The question asks specifically for the moment of a couple, so you should specify which force and which distance should be used in the calculation. Of course for two marks, do not include the diagram and example. I would probably write the following:
'(The moment of a couple is) the product of the magnitude of one the forces in a couple and the perpendicular distance between those two forces.'
But in the ms it says the force * perpendicular distance at a given point?
"Force multiplied by the perpendicular distancce from the pivot"
Consider the fact that he said "of a couple". There are 2 forces in action here, both with equal magnitude and opposite direction as one of the first posters said.
What you defined was a moment. The moment of a couple would be:
The magnitude of one of the forces within a couple multiplied by the perpendicular distance between the two forces.
Consider the fact that he said "of a couple". There are 2 forces in action here, both with equal magnitude and opposite direction as one of the first posters said.
What you defined was a moment. The moment of a couple would be:
The magnitude of one of the forces within a couple multiplied by the perpendicular distance between the two forces.
That would not be the moment, it would be the torque you are calculating.
Moment: Force multiplied by pependicular distance from the pivot
Torque: One force in a couple force multiplied by the perpendicular distance between the two forces.