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1.5.5 Turning effect of forces
1 Describe the moment of a force as a measure of its turning effect and give everyday examples
2 Define the moment of a force as moment = force × perpendicular distance from the pivot; recall and use
this equation
3 State and use the principle of moments for an object in equilibrium
4 Describe an experiment to verify the principle of moments
1.5.6 Centre of gravity
1 State what is meant by centre of gravity
2 Describe how to determine the position of the centre of gravity of a plane lamina using a plumb line
3 Describe, qualitatively, the effect of the position of the centre of gravity on the stability of simple objects
