Which of the following statement is correct as regard to the difference between a machine and a structure?
(a) The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another.
(b) The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only.
(c) A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work.
(d) all of the mentioned
I had been asked this question in final exam.
My question comes from Mechanism topic in section Simple Mechanisms of Machine Kinematics