# Moment

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Define the moment of a couple? (2)

Can i have a proper definition , every mark scheme is different?

Can i have a proper definition , every mark scheme is different?

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#2

(Original post by

Define the moment of a couple? (2)

Can i have a proper definition , every mark scheme is different?

**Ayaz789**)Define the moment of a couple? (2)

Can i have a proper definition , every mark scheme is different?

For example, if two forces of magnitude acted on a body and the perpendicular distance between them was , the moment would be:

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(Original post by

The moment of a couple is the product of either of the forces of magnitude of the couple and the perpendicular distance between those forces.

For example, if two forces of magnitude acted on a body and the perpendicular distance between them was , the moment would be:

**Smithenator5000**)The moment of a couple is the product of either of the forces of magnitude of the couple and the perpendicular distance between those forces.

For example, if two forces of magnitude acted on a body and the perpendicular distance between them was , the moment would be:

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#4

(Original post by

If i wrote Moment is the force * the perpendicular distance , would i get 2 marks?

**Ayaz789**)If i wrote Moment is the force * the perpendicular distance , would i get 2 marks?

'(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.'

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(Original post by

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.'

**Smithenator5000**)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.'

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#6

(Original post by

But in the ms it says the force * perpendicular distance at a given point?

**Ayaz789**)But in the ms it says the force * perpendicular distance at a given point?

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(Original post by

Could you please supply a link to it so I can read it?

**Smithenator5000**)Could you please supply a link to it so I can read it?

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#9

I would define a moment as:

Force * perpendicular distance (to the line of action of the force), from a pivot point.

Force * perpendicular distance (to the line of action of the force), from a pivot point.

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(Original post by

I would define a moment as:

Force * perpendicular distance (to the line of action of the force), from a pivot point.

**Wunderbarr**)I would define a moment as:

Force * perpendicular distance (to the line of action of the force), from a pivot point.

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#11

(Original post by

That would get me 2 marks yeah

**Ayaz789**)That would get me 2 marks yeah

So the part about a "at a given point" is pretty much essential.

Lastly, the perpendicular distance is the shortest distance to the line of action of the force.

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(Original post by

Just remember, moments exist because there are forces that cause rotation around a pivot point, at a distance from the pivot point.

So the part about a "at a given point" is pretty much essential.

Lastly, the perpendicular distance is the shortest distance to the line of action of the force.

**Wunderbarr**)Just remember, moments exist because there are forces that cause rotation around a pivot point, at a distance from the pivot point.

So the part about a "at a given point" is pretty much essential.

Lastly, the perpendicular distance is the shortest distance to the line of action of the force.

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#15

**Ayaz789**)

Define the moment of a couple? (2)

Can i have a proper definition , every mark scheme is different?

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#16

(Original post by

"Force multiplied by the perpendicular distancce from the pivot"

**voltz**)"Force multiplied by the perpendicular distancce from the pivot"

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.

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#17

(Original post by

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.

**M0nkey Thunder**)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.

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.

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#18

(Original post by

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.

**voltz**)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.

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