Page 55 - Science Course 2 (Book 2)
P. 55

Mo9-L2c: What is Mechanical Ef  ciency?




                              Key Concept

                         What is Mechanical Ef  ciency?

                         What is mechanical ef  ciency?






























                                 SUMMARY
                         What is Mechanical Ef  ciency?

                 The ef  ciency of a machine is never 100%—
                some work is always transformed into wasted
                      thermal energy because of friction.











































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