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moments

Basically,

anti clockwise moment = clockwise moment

moment = force x perpendicular distance between the line of action of force and the pivot

e.g.

total clockwise moment = anti clockwise moment

[br]12 N \times 0.15m = F \times (0.4-0.15)m[br][br]F = \dfrac{12 N \times 0.15}{0.25m}[br][br]F = 7.2n[br]

But, if clockwise moment = anti clockwise moment

shouldnt they both be 7.2 or 1.8 :confused:

Reply 1

Mighty Mike

The forces can be different but the moments must be the same.

So the moment clockwise is 12N * 0.15m = 1.8Nm
And the anticlockwise moment is 7.2N * 0.25m = 1.8Nm

So the moments are both the same.