A device is 100% efficient if the:

A. mechanical advantage is the same as the speed ratio
B. mechanical advantage is greater than the speed ratio
C. mechanical advantage is less than the speed ratio
D. mechanical advantage has nothing to do with the speed ratio

Question

A device is 100% efficient if the:

A. mechanical advantage is the same as the speed ratio
B. mechanical advantage is greater than the speed ratio
C. mechanical advantage is less than the speed ratio
D. mechanical advantage has nothing to do with the speed ratio

anonymous · Answer

Option A is correct. Look here for explanation http://edquestscience.com/pdf/PS-MS-2notes.pdf