Learning objectives
Define the moment of a force as force × perpendicular distance from the pivot and calculate moments in N m
Apply the principle of moments to a balanced beam with one force on each side of the pivot, and at Extended to situations with more than one force on each side
State that an object in equilibrium has no resultant force and no resultant moment, and at Extended describe an experiment showing there is no resultant moment on such an object
Explain what is meant by the centre of gravity and describe how to find it experimentally for an irregular plane lamina using a plumb line
Explain qualitatively how the position of the centre of gravity and the width of the base affect the stability of an object
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