Question

In the context of mechanical systems, what does the term efficiency mean?
A.
the factor by which a machine multiplies a force
B.
the ratio of a machine’s power to the force of its input
C.
the rate at which a machine performs work
D.
the rate at which a machine consumes energy
E.
the ratio of the work output of a machine to the work input

Answer 1

Answer:

C

Explanation

found it on the internet

Answer 2

Answer:

It's actually E.

Explanation:

The efficiency of a machine is the fraction of the input energy that the machine converts into useful work at the output