posted by Mandi .
Hello, I need some help with the folling question...
I would say B OR C though I am not sure.
In a Practical Machine , the power output is _____ the power input .
A. Smaller than
The power output is ALWAYS smaller than the power input. The old saying goes that we can't get something for nothing. No machine is 100% efficient; there is always some energy lost to friction, heat, etc. There are some processes that come close to being 100%.