Moment of force
How much spin or circular motion a force can case
Moment of force calculation
Force x perpendicular distance from fulcrum
Lever
A rigid body that can turn about a fixed pint called a fulcrum
Law of the lever
When a lever is balanced, the sum of the anti-clockwise moments equals the sum of the clockwise moments
Centre of gravity
A point in the object through which all the weight of the object appears to act
Equilibrium
When an object is balanced and still
To improve stability
Use a wide vase
Lower the centre of gravity