**Moment of force**

Moment of force is the turning effect of a force. Moment is a vector quantity that represents the magnitude of force
applied to a rotational system at a distance from the axis of
rotation. The moment of a force about a pivot is the product of a
force (F) applied and the perpendicular distance (d) from the pivot.

**Moment = F X d **

where units for F is Newton (N) and d is metre (m);
Moment is Nm

**Principle of moments for a body in equilibrium**

An object is in equilibrium if the sum of all
anticlockwise** **moments about the pivot is equal to the sum of all
clockwise moments about the same pivot.

**Effect of the position of the centre of gravity on an
object**

The lower the centre of gravity, the more stable an
object. Centre of gravity can be lower by making the base of the object
as wide as possible. In additional, making the object short is as
well another way of lowering the centre of gravity.

Find out more with diagram illustration on the effect
of position of the centre of gravity on an objects on the pivoted metre
rule.