What is meant by centre of mass ?

Describe how to find the centre of mass of a thin, irregular sheet of a material

How do you find the centre of mass of a symmetrical object ?

What does the time period of a pendulum depend on ?

state 2 applications of pendulums

what is a moment ?

state the units for the below equation:
The size of the moment is given by the equation:
M = F x d

What must be the case if an object is not turning ?

Explain why an object topples

explain how a simple lever works

how could you make something more stable and less likely to topple