311) Which of the following statement is correct as regard to the difference between a machine and a structure?

The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another

The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only

A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work

all of the above

Answer is:

all of the above

Explanation:

Following are the difference between a machine and structure
* The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
* The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
* A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work