Answer the following questions. 1. What is a simple definition of a machine?
1. What is a simple definition of a machine? What is a more technical definition? What does this definition imply? 2. Describe some very simple machines. Name some complex machines. 3. What do we call machines whose input is a natural source of energy? What natural sources of energy do you know and what machines use them? 4. Why aren’t electric motors prime movers? 5. What is force? Give some examples of force. 6. What is work? How can work be expressed mathematically? Give an example. 7. What is power? 8. How is the rate of doing work usually given in the English-speaking countries? Why was the term invented? 9. In what terms is power measured in the metric system? Machine elements/parts Word list:
Exercises to the subject:
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