Which of the following statements defines correctly the efficiency of a machine?
-
A.
the load carried by the machine divided by effort required in carrying the load -
B.
the distance moved by the load divided by the distance moved by the effort -
C.
the useful work done by the machine divided by the total work put into the machine -
D.
the movement of the load divided by the movement of the effort about the same point -
E.
the temperature at the end of the application of the machine divided by the initial temperature