Mechanical efficiency:
force x distance (output)/ force x distance (input) x 100%
ex. 700n x 2 m / 800n x 2m x 100%
1400nm/1600nm x 100%
0.875 x 100%= 875
Mechanical efficiency= 875%
The preceding example is incorrect
Mechanical efficiency is: % efficiency=output power/input power x 100