Why is the work output of any real machine less than the work needed to operate it? work is gained due to friction work is lost due to friction friction reduces the work input

work is lost due to friction

hope this helps :)

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.