Question

Explain why the efficiency of a movable Pulley is always less than 100%

Answer 1

Hi..


The single movable is not 100% because:-

Some amount energy is lost in moving parts.

Some amount energy is lost as a result of friction between the moving parts...


Hope this helps u!!

Answer 2

Answer:

Explanation:An ideal machine is that in which there is no loss of energy in any manner. Here the work output is equal to the wordk input. Which is that the efficiency of an ideal machine is 100%