1–11. You will find it advantageous to use a third-class lever when the desired result is 1. a  transformation  of  energy 2. an increase in speed 3. a  decrease  in  applied  effort 4. a decrease in speed and an increase  in  applied  effort 1–7. Which,    if any, of the following parts  illustrates  a  first  class lever? 1.  A 2. B or C 3.  D 4. None of the above 1–8. Which  part  illustrates  a second–class  lever? 1.  D 2.  C 3.  B 4.  A 1–9. What  part  illustrates  a  third–class lever? 1.  A 2. B 3.  C 4.  D 1–10. Which  of  the  following  classes  of levers should you use to lift a large weight by exerting the least effort? IN  ANSWERING  QUESTIONS  1-12  THROUGH o 1–14, SELECT THE CORRECT ARM MEASUREMENTS FROM FIGURES 1B AND 1C. 1–12. Effort arm in figure 1B 1. 1 ft 2. 3 ft 3. 4 ft 4. 5 ft 1–13. Resistance arm in figure 1B 1. 1 ft 2. 3 ft 3. 4 ft 4. 5 ft 1–14. Resistance arm in figure 1C 1. 1 ft 2. 3 ft 3. 4 ft 4. 5 ft 1. First–class 2. Second–class 3. First–  or  second–class 4. Third–class 2