Students’ everyday experiences seldom acknowledge devices like levers, inclined planes, wedges and pulleys as being types of ‘simple machines’. chainsaws, electric power tools and hydraulic excavators. This view is consistent with their experiences of most powered mechanical devices e.g. Students often believe that all machines produce much more work than their human operators put in. Students (and many adults) commonly use the word ‘machine’ to describe complex mechanical devices powered by an engine or electric motor and designed to perform useful labour saving tasks. The modern world is rich with examples of complex machines whose workings are seldom understood. Contrasting student and scientific viewsĬontrasting student and scientific views Student everyday experiences.
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