Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
· a force is an important type of mechanical effect, but it doesn't explain bending. For this we use moments.
· The classic example is the see-saw,
· Consider the case of a vise. The bottom member must resist the moment caused when the jaws are tightened.
· If we look at a normal step ladder we can see that both halves can be analysed using moments about the top platform.
· Certain varieties of tools amplify forces by using moment arms.