How to work out a moment?
Moment=Force x Perpendicular Distance from Pivot
It's written in Newton Metres (Nm)
What is the Principle of Moments?
For an object in equilibrium:
The sum of the anticlockwise moments about any point = the sum of the clockwise moments about that point.
What is centre of mass?
Every object behaves as if its mass were concentrated at one point. This point is called its centre of mass.
What affects stability?
The stability of an object is increased by making its base as wide as possible and its centre of mass as low as possible.
Vectors and Scalars
A vector is a physical quantity that has a direction
A scalar is a physical quantity that does not have direction.