turning forces and centre of gravity

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The moment is the turning effect of a force

Moment = Force x perpendicular distance between line of action

The force on the spanner causes a turning effect or moment on the nut, A larger force would mean a larger moment.

Using a longer spanner, the same force can exert a larger moment because the distance form the pivot is greater.

To get the maximum moment ( or turning effect) you need to push…

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