Question

How can you make the work output of a machine greater than the work input?

a. by decreasing friction
b. by increasing the input force
c. by increasing the output distance
d. none of the above​

Answer 1

Answer: D) none of the above

Explanation: This is a classic problem of thermodynamics, and refers to the principle of conservation of energy to give a correct answer

Option A) can be ruled out since no matter how much friction is reduced, it will always exist and therefore some energy will be lost

option B) and C) are out of context since the loss of work or energy will continue to exist even if those values ​​are modified, so they do not answer the question

D) is the correct one since it should be said that this is not possible (so far...) as it goes against the conservation of energy and this option is none of the above