Question

In a real machine why is the work output always less than the work input?

Answer 1

Because of friction, the work done bya machine is always less than thework done on the machine. Because friction is always present, the actual mechanical advantage of a machine is always less than the ideal mechanical advantage. of a machine is the number of times that the machine increases aninput force.

Answer 2

Answer:

Explanation:

It is because part of the input energy or work input is used to overcome gravitational force.